As you already know, because I explained it back in 2017 and have explained it numerous times since then, I decided not to implement Osana until Yandere Simulator contained every feature and mechanic that I felt was necessary for the game to match my vision. My vision was so elaborate, it took 6 years of work to reach this point…but I can finally say that I have a build of the game that contains pretty much everything that I felt was important to put into the game before releasing Osana. (There are still a handful of minor wishlist items that I am interested in implementing, but all of them are lower in priority than Osana.)
The last remaining task is to overhaul the game’s UI and improve the graphics. After that, I simply have to test all of Osana’s eliminations one-by-one, and then release her once I’ve fixed every bug I can find. If this build contains any critical bugs, I might have to release a bug-fixing build within the next few days…but if this build is stable, then the next build may be the build that contains Osana.
I have an estimate for how long this will take, and I want to say, “You’ll have Osana on Ju██ ██th!” but if something goes wrong and delays Osana, people will get upset that I missed the release date, so I’m going to keep the release date a secret until I’m 100% certain she’s going to be released on that day.
(It’s worth mentioning that this build does not contain voice lines for Student Council girls, since I am still waiting on two voice actresses to deliver their lines.)
So, what does this build contain? Aside from 30 bug fixes, this build also contains…
- The ability to get Student Council girls fired from the council
- Expanded saving/loading functionality
- A new phone for Yandere-chan
- Numerous UI improvements
- Props in school corridors
- Theme music for stores
- New background music for normal school gameplay
- New background music for the Alphabet Killer Challenge (provided by Fonix!)
- The ability to hide dead bodies in lockers in corridors (outside of the ABC Challenge)
- Re-written dialogue for the initial text message conversation between Yandere-chan and Info-chan
- Overhauled Calligraphy Room and Drama clubroom
- A screen for viewing the game’s controls
- Six new Headmaster Tapes
And a bit more, too! For a full list of everything that is new or different in the latest build, scroll down past this absolutely gorgeous illustration by an extremely talented artist who chose to remain anonymous.

Improvements
- Previously, it was possible to create an impossible Multi-Mission by designing the mission so that the player had to eliminate a Student Council girl with a method that did not apply to them. (For example, it was impossible to kill a Student Council girl with fire, because they dodged buckets of gasoline). As of now, Info-chan offers a new service: for the price of 25 Info Points, Info-chan will get a girl fired from the Student Council, which turns that girl into a normal student (no more pepper spray, no more supernatural dodging skills, etc). From there, you can interact with the girl normally, and kill her using methods you couldn’t use before (such as putting a note in her locker to lure her to the rooftop and pushing her off the roof). This feature is only accessible in Mission Mode, since it was implemented to accommodate Multi-Missions about eliminating Student Council girls in specific ways.
- The saving/loading feature will now accurately track which students are arrested, broken, dead, dying, expelled, exposed, holding a grudge, kidnapped, missing, photographed, replaced by a substitute, and befriended. Also, the saving/loading feature will remember reputations, which students have had their phones stolen in the past, and which students the player has already taken a panty shot of.
- Yandere-chan’s phone was designed in 2015, and was modern at the time, but looks outdated now in 2020. The appearance of the phone has been adjusted to reflect the look-and-feel of modern 2020 phones. This has resulted in a lot of extra space in many of the menus! In the near future, those pause menu screens will be updated in order to account for this extra space. The current phone artwork is placeholder and will be replaced before Osana is released.
- I was planning to avoid updating any aspects of the UI at this point in time, and save it all for the Osana demo so that the new UI would come as a complete surprise…but I couldn’t resist quickly updating the Calendar screen. Take a look if you’re interested; it’s an example of the type of UI improvement you’re going to see in the upcoming Osana build.
- I always intended to populate the school corridors with props and decorations, but it wasn’t a high priority until now. As of now, props have finally been placed into one of the school corridors (turn left after entering the school) to simulate what it’ll be like once the entire school is populated with props. The ceilings around school look different, too.
- In the future, each store on the street will have its own theme music when the player is accessing it. However, as of now, there is only one theme, and it’s the lingerie store theme, so you will hear sexy sensual music inside of every store on the street.
- The Alphabet Killer Challenge now has a unique background music! It’s over 10 minutes long and goes through many changes so that it doesn’t get too repetitive during such a long challenge. (Press “M” during the challenge to play in silence.) The music was provided by Fonix!
- Info-chan now refers to her currency as “Info Points” instead of “Panty Shots”. Open Info-chan’s menu and press the “F” key (or X button on controller) to see a tutorial pop-up describing the different ways to acquire Info Points.
- From now on, whenever a character discovers a corpse, the player will see a camera shot of the character who discovered the corpse at the bottom-left corner of the screen.
- Added one new background music track to the game (actually nine variations of one track, one for each possible combination of school atmosphere and sanity) provided by CameronF305!
- As of now, if the player gets a “Dark Ending” (for example, the Genocide Ending) the credits screen will get more spooky (red text, no cherry blossoms).
- The “hide bodies in lockers” feature from the Alphabet Killer Challenge is now a part of normal gameplay.
- The initial text message conversation where Yandere-chan meets Info-chan has been re-written.
- Updated the appearance of the Calligraphy Room (it is now closer to its final form).
- Replaced most of the models in the Drama Club with new, higher-quality models.
- The player can now view the game’s controls from the pause screen menu.
- Placing a Bug for Info-chan now gives 10 “Info Points” instead of 5.
- Added six new Headmaster Tapes – #3, #4, #5, #7, #8, and #9.
Bug Fixes
- If the player carried a corpse in Yandere-chan’s arms and dropped it off the roof, then dragged another corpse along the ground and dropped that corpse off the roof, the first corpse would teleport back to the top of the roof. This bug has been fixed.
- Fixed bug that would prevent surrounding NPCs from being easily able to detect Yandere-chan’s misbehavior if she had been sent to the guidance counselor earlier in the day, while crouching or crawling.
- Fixed bug that would make it impossible to use the “put note in student’s locker” feature for the rest of the day, if a student witnessed a corpse after seeing a note in their locker.
- Fixed bug that made it impossible for the player to remove a bucket trap from a door if the player picked up a bucket with water after creating a bucket trap elsewhere in the map.
- If you saved the game while students were swimming in the pool and then loaded the save file, the swimming students would do all sorts of strange things. This bug has been fixed.
- Fixed bug that would cause a student to slide across the ground while performing a frightened pose if they noticed a corpse while running to report a bloody weapon to a teacher.
- Fixed bug that would cause students to run towards their locker instead of running to safety, if they discovered a corpse while on their way to check their locker for a note.
- Fixed bug that would cause teachers to ignore giggles for the rest of the day if they sent Yandere-chan to the guidance counselor while responding to the sound of a giggle.
- Fixed bug that would allow the player to run around freely while being chased by a student council member if the council member gave chase while Yandere-chan was laughing.
- Fixed bug that would prevent the game from successfully loading if the player attempted to load a save file from a day when a Memorial for a dead student had taken place.
- Fixed bug that would cause the Basu sisters to have their daily conversation at their lockers, if the player got a game over while the two sisters were at their lockers.
- Fixed bug that would cause the framerate to drop significantly if the player asked a student to follow them (even after the student had stopped following the player).
- Fixed bug that would prevent outlines from appearing around a student in Yandere Vision, if that student’s info was unlocked by paying Info-chan for info about them.
- Finally fixed that annoying issue where, when you turn the camera and look at the students around you at the start of the day, the game stutters for a few seconds.
- Fixed bug that prevented the “carrying drama club props is no longer considered suspicious if Yandere-chan is in the drama club” feature from working properly.
- Fixed bug that would cause Yandere-chan to spawn with a duplicated weapon in her inventory if the game was saved while only one weapon was in her inventory.
- Restored boats to the ocean visible from the street. (Apparently, they disappeared when I updated the game to Unity 2019, and I didn’t notice until now.)
- Fixed bug that would allow the player to attend class in the gap of time between being spotted by a Heroic student and being chased by a Heroic student.
- FINALLY fixed that super-annoying bug where the Student Info menu wouldn’t show character portraits if it was accessed from Info-chan’s Services menu.
- Fixed bug that would prevent students from acknowledging the fact that Yandere-chan had picked up a weapon that they were currently investigating.
- Fixed bug that would cause the game to freak out if the player attempted to load a save while on a day when a student memorial had taken place.
- Fixed bug that caused a student to snap out of the “dying from poison” state if the player used a radio while a student was dying from poison.
- Fixed bug that would cause the faculty to detect a murder weapon at school even if the player had cleaned blood off their murder weapon.
- During the Alphabet Killer Challenge, stink bombs will no longer have an effect on characters who have witnessed murder or a corpse.
- Fixed bug that would cause the camera’s rotation to snap to default rotation whenever the player stopped aiming their camera.
- Fixed bug that prevented the player from attending class if they had gotten into a physical struggle earlier in the day.
- Fixed bug that prevented the “innocuous objects become suspicious after becoming bloody” feature from working properly.
- Attempted to fix “female students are invisible” bug, which would only happen on certain very old graphics cards.
- Fixed bug that allowed the player to attach multiple buckets to the wood-chipper, instead of just one.
- Tutorials may have been broken in the previous build. This bug has been fixed.

The Latest he can have Osana in game finally is, July 30th
earliest: June 4th.
how do u know?
Ju__ which can either be June or July, and since July is the latest of those 2 months, thats the latest.
__th, so 1st, 2nd, 3rd, 4th, 4th is the earliest number ending in th. 30th is the last.
So they’re correct. Earliest is June 4th, latest is July 30th.
Not true. he said I WANT to say you’ll have osana on Ju|| ||th not You will get osana on ju|| ||th
Exactly.
Could also be ju[when everything is done]th
I don’t think, he said that. 😅
hi yandere dev! i have a suggestion but im not sure if it’s good though, can you add-in new killing animations when ayano is in snap mode? cause when she’s holding a knife in snap mode, it’s the same punching animation but with a knife in their hand. if it’s a bad idea or it would take a ridicoulus amount of time, maybe you can set the idea aside or ignore it and let it stay to the same punching annimation, but i’ll leave the choice to you
see you in the next update video 🙂
That’s a good idea! He can use some heavy slashing motion and the victim turns out in pieces like Yanchan used the circular saw on them!
Yandere dev for some how if i use the media fire it goes to the may 15th build and not the june 1st can you fix this?
just reload the page, or try the other links
If this happens around my birthday that would be amazing omg
juat pushed akane of the roof and it felt soo good to finally put her in her place, love the update so much and cant wait for osana, keep up the great work, the final pieces are nearly in place
But akane is so cute!
And she looks so sweet!
Why would you kill her?
Well, Osana is very beautifull and i will eliminate her in every way possible.
I happy and excited to see this. Although you should keep things like the week menus, school hall, YanChan’s phone a surprise, don’t let excitement take over you.
YOU DON’T EVEN KNOW HOW EXCITED I WAS FOR THIS!!! Can’t wait to see Bijuu Mike, Jay from the Kubz Scout, LaurenzSide
The game is finally coming together [applause for YanDev]
OWO
whenever i teleport to the roof, midori teleports with me. on top of that, she dosen’t move of have any animations unless i giggle or hold a weapon around her, etc.
that was always the case. midori is a quick key to test things.
Hey Yandere Dev,
I have a question that I hope you will answer. Will we be able to go to class without getting caught if we hide the bodies in the lockers? Sorry I didn’t get back to you on that glitch of objects and characters glitching out. My computer crashed. Good news is I got a 64 bit gaming computer. So, I just got more impressed because the fps is exactly what you said it would be and I was on Max! I’m very happy! In the May 15th build, I still encountered that glitch even when I went to class. I will say that the glitches seem less though when I do go to class. But the longer I wait to go to class or if I don’t go to class at all, the higher the glitch probability. I am not ruling out that the longer I wait to go to class that the glitch occurs because it starts during the first class sometimes. It could deal with maybe the game glitches out if we kill a certain number of characters nor maybe it thinks there is a limit as to how many npcs we can kill. I was using the magical girl wand and wasn’t in a club. For those that have encountered this type of glitch, were you able to fix it and how? I was on my last 20 characters before it glitched out and it usually happens after the 2nd class during cleaning time. Who knows? Maybe I won’t encounter the glitch in this build.
I can’t wait to play this new build though!
Hey YandereDev whenever i play the game i always see ayano’s skirt have hole in them when i make her run or crouch this also happens the the female students when i drown them.I also have a question about the debug menu are you going to completely remove it or are you going to remove some of the things in the debug menu.
he will make a cheat code that will allow the player to use debug menu. also i think that he will leave a trace of debug menu, just to censor all of dirty things.
WE CAN FIRE STUDENT COUNCIL MEMBERS
I haven’t tried it but saw Jay do it and Shiromi being my favorite SC member I felt bad… So if it’s to acomodate mission mode, you won’t add it to the normal game, will you ?
Dang yandere dev. I sent you a whole e-mail with bugs when you upgraded the game engine, and I included the boat bug, but you either fixed them “one by one” or “didnt even notice them”
You were probably one of the thousands that he doesng get to read because they come in thousands
Aww tbh I was hoping for bloody cherry blossoms falling down when you get the Dark Ending 😔 but I love how close Osana is and this build!
I cant wait for the Osana update. I know many MANY people have been waiting for this update for YEARS! ❤
um what about the other incomplete rooms
Dont worry they’l be cpmpleted eventualy!
cap
Please tell me that I’m not the only one whose game has become very lag after the update 😦
I guess he is going to put that things with Osana or after Osana. Because he doesn’t want to keep us waiting any longer
Congratulations, YandereDev. I hope you’re able to get Osana in soon.
Way to go Yandere-Dev! Can’t wait to see it!
OMG!!!! I can’t wait!!! But if you need two voices I can be one of them!! I actually don’t have any experience and I’m not an voice actress but I wanna help you and nothing will make me feel more happy than I would be an voice actress of the game that I love the most!!! Please take my opinion like a good offer and I hope you see this. ❤️
In the words of Osana Nagami, “I..I don’t get it…I should be happy..but i can’t stop crying!
Interesting update.
I agree! UWU
I’m glad you feel so accomplished YanDev! You should be proud of yourself 🙂
I need a Mac version, could you let me know if there will be one 🥺🥺
To quote the about page:
“I only have a Windows PC. I don’t own any computers using the Mac or Linux operating systems. If I exported a Mac / Linux build, I’d have no way to test it. I’d just be throwing a build onto the Internet and praying that people can run it, with no real way to debug it if it doesn’t work.[…]
It’s simply too time-consuming to export PC+Mac+Linux every time I want to make a new build, especially when I can’t even test the Mac or Linux builds.
I can’t justify working on multiple platforms right now; so I will be maintaining my focus exclusively on PC for the time being. I won’t begin to consider exporting Mac or Linux builds of the game until after the first official rival is implemented.”
So you’d have to wait for Osana to be released, then the *possibility* will be there
This is super exciting! I hope all goes well!
I can’t wait for Osana Najimi to come! And I believe it’s on June 30.. Or July 4.
I can’t wait for Osana Najimi to come! If Osana is in the game is Raibaru too?
Guesses for the date:June 30 or July 4
jeez i just can’t wait for it. I’m hella excited I CAN’T WAIT. 😭💖
What about the basement tapes? Are you ever gonna finish those?
The basement tapes are meant to hidden underneath furniture in the basement, which means that they are unlocked by moving furniture in the basement. Yandere-chan is meant to move furniture to make room for kidnapped victims in her basement, which means that the only way to find new basement tapes is to kidnap at least 10 girls and keep them all in your basement simultaneously.
Since you can’t do that in the demo, no reason for more tapes in the demo.
This is my humble opinion, you shouldn’t force people to kidnap 10 girls to unlock the tapes. It makes is sound like you need to kidnap each week a girl. instead of freely going to the basement, to clean it up and find the tapes. Plus the basement gonna get bigger?
Wow, i didn’t have idea that you can keep 10 girls in the basemant at the same time.
YandereDev, will you implement the possibility to release a kidnapped girl without lowering her sanity to 0% with torture? So, to release a kidnapped girl at full sanity?
I have been waiting since he showcased the suicide notes (5 years ago) for Osana and I’m SUPER EXCITED hope yandere dev sees this
Knowing that the game is almost finished and Osana will be implemented soon, is making me all hyper, like a 6 year old when their mother agrees to buy them candy. I have a few suggestions. For the empty rooms, maybe one room could be used in Osana’s elimination. The room would be a room with trophies from the sports club, the drama club, the cooking club, ect. But, to use that elimination. you would have to take Osana’s bag without anyone noticing. Since her bag is orange, people would know it’s hers, cause nobody else has an orange bag. You would take it, go to the room, and place it there. When she goes inside, instead of immediately grabbing her bag, she would stare at the trophies for some time, then grab her bag. That’s when you can murder her. Since she’d be so close to the glass, it would break and make a sound. It would be too easy to murder her without the glass breaking. Any teachers near would go to inspect, so you’d have to be fast and the hallways have to be empty. Doing it correctly will result in Raibaru becoming depressed, and Taro would think of her death all the time, and his fear would raise a bit. There could also be, if you do one of the science club member’s task, they could make you a robot version of Osana just like her. She would feel like a human, speak like a human, and look like a human. Since she’s a robot, she’l break down when she touches water, so you have to be VERY careful. So, when going to the pool, she’d tell Raibaru she isn’t feeling too good, and wants to do something else, like watching cat videos, since Osana loves cats. If this happens every single day of the week, Raibaru would become suspicious of “Osana”. So every day, you’d have to prevent her to going to the pool with Osana, like saying that they’re cleaning the pool, or the bullies are already there and will go again later. If everything goes perfect, then Yandere-Chan could move on to the next rival. This is a method you’d only be able to kill Osana with. This is just my idea, and you don’t have to implement it.
“ I simply have to test all of Osana’s eliminations one-by-one, and then release her once I’ve fixed every bug I can find.”
Hatsune Elissu: I’m about to end this man’s whole career
Not anymore because the mod doesn’t work. 😂
działa
I think everyone knows it, but I haven’t seen any comment about it and I don’t know if Yandere Dev is fixing it or left it on purpose, but when you take out the camera, Yandere-Chan has her old cell phone, anyway, I think this is not important, but I wanted to say it
this is the last build could you plz realease the game on Android with low graphics like hello neighbor
I was thinking you could maybe give the floors in the school each a slightly different color (eg one slightly more orange and another slightly more yellow) Because I think that would help differentiate the floors a bit more, so the player can orient themselves better.
How about according to diffrent grades?
The first years studying on the first floor Will have a green floor, Red for the second and Blue for the third
hey alex! great to see youve reached this far despite all the backlash people are giving you for taking so long. love your work and i hope you do to.
A lot of people hate on yandere dev because they think its gonna take another 6 years to add amai too which is really annoying because he actually had to make the game first. like he said, he had to ad everything he wanted to add everything that was a higher priority so it’s very annoying when people hate on him about that.
I know what you mean; besides, the whole point of putting all those things in before Osana, was because the release of Osana would mark the actual demo of the game, instead of just a debug. I believe YandereDev mentioned that once the demo was finished, he would start a Kickstarter or something to fund the actual full game and hire a small team. He wanted to wait for the demo to be finished exactly BECAUSE he didn’t want people to think he was just scamming them
Am i the only one who hopes that oka should be bi ?
Am i the only one?
Yes…
Okay..
I would love that so much! Oka bi – LOVE IT
Great Job YandereDev!! I have been following your game for 5 years It has improved so much over the past 5 years,I Can’t wait to be able to have Osana without mods keep up the amazing work your doing an amazing job!
Please hire a few debug testers before you release Osana to play the game and find bugs. People hired for it are more likely not to leak it, and if you don’t want to, just get volunteers you know you can trust and let them preview the final product for the game before Osana. >What would be ideal is twinks like bodies spazzing out when dragging,camera movement (such as when you first stab someone, there’s camera movement. Other times afterward, it’s fine to have none so it’s less annoying), more expressive faces during animations, and unlockable things (such as pretending to have emotion or caring when someone is killed.) within it, to name a few.
Am I reeeeeally the only one who noticed a short red haired girl T-posing next to the “Go home” option ? Kinda reminds me of when Osana was T-posing at the corner of a corridor a super long time ago. I’m trying to figure out who it is, I’m sure it’s not Info-chan…
same!!! I thought it was Info-Chan because I was mixing up student files a bit, but as you can see, not only I have it
Something strange happened while playing, when it was lunchtime, I teleported to the entrance of the school, in the distance I saw a red-haired girl, like Yui, but she did not have her side ponytail, she was acting as a model character. With arms outstretched without moving, I took a photo but Info-Chan did not recognize it so I saved it and took a screenshot. I hope that someone read this and confirm it, because is pretty weird
same
It’s a very good and beautiful build but in my opinion i prefered the old type of the week screen (maybe im not used to see It)
OWO
Will the “demo” be more optimized? When playing Half Life alyx with ultra-high detailing my FPS rarely dips below 90, but in YanSim my FPS never goes beyond 40
Here are my specs:
-AMD ryzen 7 2700 eight core processor
-16GB ram
-NVIDIA GeForce RTX 2070
How? I have 8 gb of ram,gtx 1060 ti and I have 70 fps…🤔
good for you but I had I’m sure you experience bugs, everybody does because of the Easter eggs
What?? Are you saying that the bugs are from Easter Eggs? Wow. You made me speechless…
To be frank Half life alyx is not very complex, yandere sim has among teh most complex ai in any game that exist, and there is 100 of them who can react to wide variety of situation AND have their own personality, that’s the thing who hit your machine. And since said ai got more complex over time, and he is using unity, it’s only when the feature set is done that he will be able to optimize. It’s mostly cpu bound.
I’m guessing that you have shadows enabled. (Can you see the shadows of the trees as you enter the school?)
Shadows have not been optimized too much yet, and they’re a fairly heavy process. Basically, Unity creates four cameras in the scene that look down the main light’s path, and draws the distance to every shadow caster. That texture is used later, during the lighting calculation, to see whether the object being lit is in front of (or behind) the nearest shadow caster from the camera.
This can be optimized by experimenting with fewer cameras (although this will make shadows degrade quicker with distance), by disabling irrelevant shadow casters, or by combining shadow-casting objects so you only have to pay the scheduling once to draw what appears to be multiple shadows. (You can also give it a custom vertex shadow to make it move a bit, like the wind in the trees.)
It’s tedious work that’s simple, but could also get in the way if you’re still moving stuff around. (Imagine combining three trees then deciding that you need to move the left one a bit.)
Anyone tried squid ? It’s delicious when it’s alive 😉
lol but don’t you dare pepper spray me (jk twt)
I can’t wait!!!! ༼ つ ◕_◕ ༽つ
Now I can FINALLY, have OSANA in the game, without doing any mods to use! 😁
P.S have a good day peeps! UwU
Yandere Dev there are 2 “bugs”: 1) you forgot to update the writing below left the old writing (May 15 instead of June 1)
2) the phone has changed but when you take pictures there is still the old phone.
Is it Tokimeki memorial the last game that influence the dev?
osana coming out on the fifth or the fourth i hope fourth