Hi! I’m very sorry, but there won’t be a video today. Recently, I’ve just felt like working on the game way more than working on videos.
In January, I explained that Osana became functionally complete in December of 2019, and that I planned to release her after fixing bugs, polishing up the rough-looking parts of the game, and basically just making sure that the demo represents my vision of what the game is supposed to be like. Making the demo “represent my vision” is a somewhat broad category; sometimes it involves implementing the last remaining core gameplay functionality, and sometimes it involves implementing something that is unrelated to gameplay, yet still very important to me nonetheless, because it that makes the demo true to my vision.
In terms of “last remaining core gameplay functionality”, the only thing that is still missing is a Save/Load feature. Over the past 2 weeks, I spent some time trying to reach that goal, but ran into a lot of obstacles. It started to look like the sort of thing that would eat up way too much time, so I decided to request help from other programmers. The feature isn’t 100% ready yet, but some promising progress has been made.
In terms of “making the demo true to my vision”, there are only two or three more things that the demo needs to have before I feel like, “Yes! My vision is complete! Time to release Osana!” These things are actually related to the game’s backstory/lore and potential consequences of the player’s actions.
I didn’t want to release another update unless I was finished implementing Saving/Loading, or finished implementing a long-planned surprise related to the game’s lore. However, I didn’t want you to spend too much time without a new build, so in honor of my “1st and 15th day of every month” tradition, I’m releasing a new update today!
The latest build has a huge number of changes from the previous build – almost 40! One of them is something I’ve been planning since 2014 – and I have a screenshot to prove it! To read about everything that is new, fixed, or different in the latest build, scroll down past this amazing Yandere-chan cosplay video by snowthesaltqueen!
Sorry, I couldn’t resist, here’s another video from snowthesaltqueen!
Oh, did you think I was done? Here’s another!
Fixes, Changes, Additions
- From now on, committing at least 50 murders over the course of gameplay will cause Akademi to shut down, resulting in a game over. (This is to discourage players from trying to make it trivially easy to eliminate all rivals by simply murdering all potential witnesses instead of using stealth, manipulation, and distraction.)
- Fixed bug that would cause multiple characters in the same situation to all say the same line simultaneously or within a short span of time. (No more listening to 6 teachers simultaneously tell you that you’re trespassing, or hearing “Screw this, I’m outta here!” from 5 delinquents simultaneously.)
- Previously, I didn’t have a “male dying from poisoned food” voice recording, so male students were using female voices while dying from poison. I received male voice recording for this circumstance, so male students now use a male voice when dying from poison.
- The two science club boys who have conversations about Magical Girl Pretty Miyuki now have another conversation about another fictional franchise that exists in Yandere Sim’s world, after Cleaning Time on Monday.
- Fixed bug that caused Student Council Members to fail to execute their code properly if they were distracted by the sound of Yandere-chan running while noticing a dropped weapon on the ground.
- Fixed bug that caused the police countdown timer to freeze if Yandere-chan was sent to the counselor while the police were coming to school, but all corpses had already been disposed of.
- Fixed bug that would cause the player to become unable to interact with a student if a stink bomb was used on that student while they were noticing Yandere-chan do something alarming.
- When leaving a note in a student’s locker, the list of potential topics you can leave notes about has changed slightly; it’s related to one of Osana’s elimination methods.
- Fixed bug that would cause the game to crash if the player attempted to start the Alphabet Killer Challenge while some students had already been killed on a previous day.
- Fixed bug that would cause a student’s circular “countdown timer” to remain above their head permanently if they entered a stink bomb cloud while following Yandere-chan.
- Fixed bug that would cause Yandere-chan to get stuck between a door and a wall if she was standing between a door and a wall when a student opened the door.
- Fixed bug that would cause Student Council members to have a long delay before entering their pepper-spraying animations, under specific circumstances.
- Fixed bug that would prevent the camera from working properly in SNAP Mode if it was activated after Senpai ripped a mask off of Yandere-chan’s face.
- Fixed bug that caused teachers to stop investigating giggles if they located a dropped weapon while investigating a giggle earlier in the day.
- Fixed bug that would allow the player to kill students out-of-order in the Alphabet Killer Challenge if the student was killed in a struggle.
- Attempted to fix a bug that would prevent the player from being able to interact with objects / students during the Alphabet Killer Challenge.
- When leaving Yandere-chan’s room, the number of options that you are presented with is different. This is related to one of Osana’s events.
- Added some props to the Calligraphy room. (Still unfinished.) (The Calligraphy room will be relevant during one of the rivals’ events.)
- The storage rooms all looked really awful, so they have been re-designed with new appearances. (The “Meme Closet” is still the same.)
- Fixed bug that would prevent Yandere-chan from putting a body into a locker if she was dragging the corpse instead of carrying it.
- Fixed bug that would cause Student Council members to snap out of their pepper-spraying animations under specific circumstances.
- To make non-concealable weapons functionally different from concealable weapons, blunt weapons no longer leave blood pools.
- Made further attempts to fix a bug that would prevent Yandere-chan from automatically attacking students at low sanity.
- Fixed some students that were not in alphabetical order or not included in the Alphabet Killer Challenge.
- Fixed bug that prevented amnesia bombs from properly affecting delinquents who were chasing the player.
- Fixed bug that would cause Yandere-chan’s eyes to turn solid white when being attacked by Nemesis.
- Fixed bug that prevented students from reacting to Yandere-chan aiming a camera at their faces.
- Fixed bug that made Mission Mode text blurry and unreadable at low quality settings.
- Added 3 new hairstyles for Yandere-chan. (That brings the total to 200…whoa!)
- Fixed bug that allowed the player to put a bucket inside of a trash can.
- Fixed error in Supana Churu’s portrait.
- Replaced Mai Waifu’s hair model.
Basu Sister Update
This one is really exciting to talk about!
5 years ago, I announced that I had a plan for the Basu sisters; I said that I wanted them to have daily conversations that allow the player to learn more about the school and its lore.

About 10 days ago, I finally implemented those conversations!
- Every day, Sakyu and Inkyu sit on a bench and have a conversation with each other.
- These conversations are private; if they know that you are eavesdropping on them, they will stop talking.
- There are meant to be 50 conversations over the course of the game. Because the Osana demo is only 5 days long, there will only be 5 conversations in the demo.
- If the police visited school on the previous day, the sisters will skip their daily conversation and talk about the police investigation, instead. (This means that if you want to hear all 50 conversations, you will have to avoid ever letting the police visit the school over the course of the game.)
- If one of the sisters has witnessed Yandere-chan commit murder, they will have a completely different type of conversation, and will never have a “lore” conversation again.
- The sisters now have a new routine at school – instead of just heading to the rooftop and spending all day talking there, they now walk around to various locations, as if they are…searching for something…
- Sakyu now has a voiced line if she catches Yandere-chan trying to steal her ring at lunchtime.
What’s Next?
You might be wondering if the above list represents everything I worked on over the past 2 weeks. Not at all! The Basu sister stuff went into the game super fast, and I’m relying on someone else’s help with the Save/Load feature, so I spent the rest of my time working on preparing Osana for release. Not “Gameplay functionality that is needed before Osana can be added”, not “Stuff that is necessary for the demo to be true to my vision,” but straight-up working directly on Osana.
Specifically, I’m currently in the process of adding the last remaining bits of polish to her Befriend/Betray event. Just like with SNAP Mode, it has been extremely gratifying to work on, because the way it looks/feels is exactly what I always imagined. It feels like magic when something goes into the game precisely the way I always saw it in my mind!
I have a text file on my desktop listing the last remaining things that need to happen before Osana is released; “directly on Osana” things, not “true to my vision” things. That list is now down to less than 10 items, and the majority of them are about fixing bugs related to Osana, testing edge-case scenarios in Osana events, or requesting missing lines from voice actresses. It’s an incredible feeling! I’m getting this, “Whoa, it’s really happening, I’m actually doing it!” sensation, and it feels amazing!
Thank you for your patience during this final stretch, and thank you for following the development of Yandere Simulator!

Super!!! Downloading…
Great job,YanDev! You’re an amazing developer! Time to download the build..🤗☺
Wow so close… Also love discovering lore can’t wait to stalk the Basu sisters!
me too >:)
Wow! This is a lot of progress, Thank you so much for working soo hard!!
Your doing great Yandere Dev! We are all supporting you all the way through!
Waw great Job YandereDev !!!!
I’m crying Right now. It’s so close.
Also, Yandere Dev, I See you’re a Man of Culture as well. Sakyu is the straight Man and Inkyu is the silly Man. You researched on Japanese comedy. I really like that. I’m looking forward to checking out what Mike, Jay and Razz say about their conversations.
It feels just like 2017 again. Seeing you get your motivation back and that you’re making Faster progress on the Game is making feel so happy for you Right now. Thank you Yandere Dev. I imagine the next video you upload will be something huge.
I’m just so happy and excited Right now. You’re amazing and wonderful Man.
Hi, Yandere Dev it’s me again. I have 2 important questions to ask
How are you doing? Has the quarantine affected you in any significant negative way? I hope it hasn’t
I watch his streams nearly everyday, and it doesn’t seem that it has affected his mental health much. He just said that he wishes he could order food, but he’s worried that someone might have coughed on the food.
Yandere Dev Can you read this comment is important Didn’t you say you could join the student council club? Answer me this comment Yandere Dev
Currently you can’t, and don’t be so demanding, he’s not entitled to answer.
Keep up the good work! I wish you luck and happiness. I love the game so much and how it turns out. In fact, I love all of the little details and the whole game!! I express in words how much this new update to my favorite game made me feel. 💖💖💖
I cannot* ahaha, I’m too happy that I cannot even write 😂😂
I feel the same way about this. I wonder when we’ll be able to celebrate
MONG YANDEREDEV ĐỌC HẾT!: “Tôi rất mong đợi ngày 1/5 này cả tháng và kết quả thật hài lòng! Cảm ơn YandereDev! Mong chờ!🎉🎉🎉🥰Tôi có ý kiến nhỏ nếu trong chế độ A,B,C chiếc túi tội phạm . Tôi nghĩ nếu vũ khí trong túi được lấy ra khi nhấn 1 nút nào đó,.. thật dễ dàng như lúc tội phạm lấy nó ra thì đó có thể rất tuyệt vời!☺☺☺/ và trong lúc tôi chơi ở mức đồ họa LOW…thì ngực của Mai & Kokona bị …biến dạng..🥴🥴🥴/ lúc tôi chơi MissionMode thì …bỗng nhiên có tiếng nhạc nhẹ nhàng ở chế độ trường học bình thường/ Senpai xuất hiện???/ khi thua Games thì vẫn xuất hiện màn hình của sự kết thúc nhưng…thay vì màu đỏ thì đó là không có màu???..và tôi mới phát hiện khi chơi Senpai của đêm tôi giết càng nhiều thây ma thì chỉ số bị hạ của tôi càng thấp…chỉ 1 cú là có thể hạ Yanvila !!!!!!!!!! THẬT TUYỆT VỜ!!!!!!I”
*Gasp* You took Mai Waifu to a hair salon during the pandemic? Don’t you know that hair salons are a non-essential service?
But seriously, nice job! Knowing that Osana will be in the game soon is super exciting!
Great Job YandereDev, keep up the great work you’ve done
Yandere Dev can you read this comment is it important you didn’t say that Yandere Chan could join the student council club on yandere simulator? Reply me this comment Yandere Dev
Hey guys. I was just wondering when and where Sakyu and Inkyu have their conversations? I was following them the whole day and no conversation ever sparked. I was staying at a considerable distance so they couldn’t see me but they never actually had any conversation.
The conversations happens in the early morning (7:05) in the fountain near the gardening club
I’m still trying but they should have their Monday conversation at the fountain on the left after they change their shoes, during lunch they will be at the roof. I’m not sure about the rest tho
I was really worried you wouldn’t update the game and I am really happy that you are motivated to continue making the game from demo to official ! Don’t give up!
I wonder what Jay’s reaction will be…
saaaaaame!
YAS gurl!
So much cool! I’m downloading it!
Please don’t mention Osana in the comments, it might put him under pressure and I don’t want anyone to feel that way
you are the best
Hehe jay still cant do alphabet killer challenge
Just downloaded the build, great work yanderedev! A lot of bugs though. Example, during the lunch conversation on Monday, as long as you are standing in the area the basu sisters are to talk, they will notice you eavesdropping even though they haven’t begun the conversation yet. There are more bugs of course but that’s just one I got. I love how they call each other sister though, it’s so cute ❤
Tomorrow is my birthday
Great job! This sounds wonderful. I absolutely love scripted events that make the school feel more real, no matter if they’re serious, jokes, or meant to be dumb, please keep adding lots of those after the demo is out.
Also, I found a bug in the last build. If you’re in the drama club, wearing gloves, kill someone, and don’t manually remove the gloves before showering (it isn’t enough to let the game remove them by changing into a towel), you will be permanently “bloody” to the students even in a new uniform, even if you burn the bloody gloves and clothes.
I’m glad things are working according to your vision. I know it’s a great feeling!
YandereDev You could add more dialogue between the science boys for the other days but I don’t want you to feel pression but its an good idea
I am surprised that the bloody gloves bug isn’t fixed yet.
I think you should chance the Basu Sisters hair model and face texture.
You are doing very well! Keep doing great things! YandereDev!
Can’t wait to check it out! I support you all the way!
Hi YandereDev! I just noticed that in the Love Sick Main Menu screen the windows are transparent, so you can see the sky. But not in the Senpai creation screen…
Keep it coming, we are finally in the final skirmish. I feel like Armin when Eren is about plug the hole in the Trost district.
that feel when you get a huge update the day after you get a new computer after not having one since February. *o*
Great Job YandereDev! I can’t wait to see how this turns out! I really like your ideea of making the Basu sisters such interesting characters. I can’t wait to download the build! Thanks for everything Dev, you’re doing great!
Im really excited how you’re working von Thema Game! But can you release a Video in The next few days?
Hey Yandere Dev,
I hope you read this at some point. I can’t wait to play this new update. I most likely won’t get to it until tomorrow. I hope at least one of my theories I gave you were helpful. I’m just curious as to what it was that you think caused the glitch if it’s not yop-secret?
I’m so glad you feel that way by your description! I literally almost shed a tear once you updated showing off your description. You have literally come a long way, for sure! Most of us fans have unconditional love for you if we are the ones who understand game development takes a long time. I hope you are ignoring the haters out there. I feel what you said in this update is proof of that. I also like how you always thank your fans. Us fans really do appreciate you thanking us. It shoes that you are appreciative of us. I would see it in your videos about it and I think that’s how I started to admire you before seeing more of your hard work in the videos. So while you are thanking us, we are also thanking you for creating a game that fills us with joy!
Please don’t worry about hate and take breaks when you want to, Yandere Dev!
Good job YandereDev! But just to let you know, Snow is a really bad person. They have been known for making fun of and belittling less popular cosplayers, being extremely toxic/manipulative, and they don’t do this anymore but they used to lewd minors and they danced on graves at one point. Notorious for having sex at corners of cons, etc. I agree, amazing cosplay, but horrible person 😦
Why arent there missing person posters anymore?
I’ve been thinking the same thing. When I killed someone, got rid of evidence, no posters appeared.
this build is full of bugs look at the video https://www.youtube.com/watch?v=mLGhyL2r58E
*screeches in fangirl*
The conversations to learn lore and see reactions to the school’s current events is so freaking exciting how AWESOME! The amount of progress that’s been made toward the demo over 2020 so far has been so great to see! It’s nice to have something to look forward to during this otherwise hellish year in history. I’m STOKED! Keep up the great work, YandereDev. I hope this means you’re getting closer to a better mental and emotional state in your daily life. As always, wishing you peace and happiness 🙂
Time to go stalk Kubz Scouts for new video
Great job yandev another great round of bug fixes! I actually quite like the bug where yan chan kills people on low sanity
So cool! Especially the conversations of the Basu sisters
Mai Waifu’s new hair is beautiful ❤
I’m gonna download this right now and get the lore conversations! Ooh! I’m so excited! It seems like we really are in the final stretch before Osana’s finished, and I’m just looking so much forward to finally getting a taste for what the full game will be like and getting to try all the elimination methods:D
People are like ‘wow this is never gonna be released’ and ‘this other game with a team and less graphical requirements was released in half the time!’. I just look at all the shitty yandere sim knockoff’s with lots of bugs and shitty graphics and wonder if that’s what they want.
The Basu sisters are buggy when you stand far way to listen to them, it wasn’t just me. I watched Jay’s new video (Kubz Scouts) and he experienced it too.
Wow Yandere Dev! This is so cool! I love all the new features, and now it feels like we’re actually her, where finally Osana will be released!!!
yandere dev we apreciate all the work and efort that you put into the game but (here is the but) Osana is the first rival. Yes there should be consequences and a challenge but it should be more easy to eliminate her. I mean she has an most likely a indestructible bodyguard. And there is much more to it that doesent make sense like if all the characters are over 18 why does she need a fake id. I hope you dont get this as hate like all the other comment and you wont delete it. Thank you for your time!
In Japan, you need to be over 20 to get cigarettes, alcohol, etc.
In the Demo Osana is supposed to be like eliminating Asu (5th week, fairly difficult). In the final game she’ll be much easier to eliminate