
Mandatory Mentor
A downloadable game for Windows, macOS, Linux, and Android
Mandatory Mentor thrusts you into the high-stakes role of tutoring Reina—a hopeless, spoiled, and bratty student who only has seven days to study for and ace the University of Tokyo entrance exam. To eliminate distractions, you and Reina are forcibly exiled to a deserted tropical island to focus entirely on her studies.
Failure means the island becomes your permanent home—where coconuts and ramen are your only companions. Success? A one-way ticket back to civilization.
Will you mold Reina into a star scholar worthy of Tokyo University? Or will you fail miserably and settle into your new career as a Coconut Collector?

- Fully Voiced Dialogue! Hear her words, feel her emotions. All of Reina's in-game dialogue is fully voiced!
- Playthrough Rewards!
Didn't get the ending you wanted? No worries! After your first, third, fifth, and tenth playthrough, you'll unlock game-changing modifiers to shift fate in your favor! Enjoy starting your next run with a Big Large Paddle!
- Every Choice Matters! A heart-pounding seven-day countdown where every Meal, Lesson, Reward and Punishment counts. Don't spoil Reina too much now... No one likes a Brat!
- Gallery Mode! Great moments deserve a second look. The Gallery Mode lets you revisit all the scene you've unlocked! You know... For reasons!
- Achievement System! Think you're done? Anyone can finish the game, but only the worthy uncover every hidden challenge!
- Survival Mode! A whole new way to play beyond the standard game mode! In this brutal challenge, Reina is cursed, and time is not on her side. Each day, her strength dwindles as Trait Attrition eats away at her stats. Careful management of meals, lessons, and punishments is the only way to keep her going—because once her stats hit zero, it’s game over.
If you like the game and want to support my creative activities, please consider checking out my pixivFANBOX or SubscribeStar page!
Updated | 19 days ago |
Published | 21 days ago |
Status | Released |
Platforms | Windows, macOS, Linux, Android |
Rating | Rated 4.7 out of 5 stars (23 total ratings) |
Author | Kana |
Genre | Visual Novel |
Made with | Ren'Py, Blender, Audacity, Paint.net |
Tags | 3D, Adult, Comedy, Eroge, Erotic, Hentai, No AI, NSFW, Porn, spanking |
Average session | A few hours |
Languages | English, French, Japanese, Chinese (Simplified) |
Inputs | Keyboard, Mouse, Touchscreen, Smartphone |
Accessibility | Color-blind friendly, Subtitles, High-contrast |
Links | pixivFANBOX, SubscribeStar, Twitter/X, Pixiv, Iwara, SpankingTube |
Purchase
In order to download this game you must purchase it at or above the minimum price of $3.95 USD. You will get access to the following files:
Development log
- Changelog 1.0 --> 1.1 [Mini-DLC #1]21 days ago
Comments
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what is the "bug likes to hide", it requires 3 of them
100 percent beat it!
Congratulations! (⁀ᗢ⁀)
Thank you for all the hard work you put into making the game Kana. Id be lying if I said I wasn't jealous of Reina, wish it was me getting the paddle and strap and doing corner time! But this is the 2nd best thing possible (:
any cheat code to unlock everything please?
game is very fun with many options and gameplay styles. If it's possible to give a scoregive it a full score. The animation plot is also very detailedI am looking forward to the next update very much
Good game!Survival mode is interesting
Good game! I just found that other endings (especially good/naked) seems to take precedence over the horrible ending. I don't think Reina would want to return to me even if she got into UoT though.
how can i unlock the last picture of the"bedtime b*tt"?
The last "bedtime butt" picture is unlocked from the "send to bed" punishment in survival mode.
Can I get a hint for the "that was insane" achievement?
It's the harder Survival mode.
为什么你不回答第一个问题?(我真的很想知道)
TY. I didn't realize I hadn't tried that one yet.
how do you get the punish her all 7 days achievement, everytime I do she gives up
So for this one you need to punish her all 7 days, but you need to make sure you don't trigger the horrible ending (punish her 3 times when she has good/good lessons).
You should aim for 1 good and 1 bad lesson or 2 bad lessons each day. So try to keep her behavior low by choosing lighter punishments.
average,good,naked,bad,horrible have unlocked
If you have more than 5+ playthrough's, "???" mode should have been unlocked automatically after the 5th one.
Based on reports from other players, the only 2 ways that ??? mode would remain locked is if the player used "save/load scumming" method to quickly get achievements, or if the player didn't truly get to the "end" of the playthrough, i.e. sent back to main menu which is needed to grant certain unlocks and trigger counters.
I'm looking into adding a patch for the next update to help address the issues I described above. However, if neither of these situations apply to you, please do let me know.
How can I achieve the final ending's accomplishment?
Screenshot the one you are missing.
I bought the original game and I thought it was 20/10 and gosh, the scenes were 10/10, everything was very good. Will there be any other DLC?
Glad you enjoyed the game, and thank you for your support! If the game is well received, I definitely plan to add another DLC later on.
Could you please tell me how to unlock the last peach? I feel like I've tried everything!
For the first one to get started. Open the preferences menu, scroll all the way down, and look really really closely. The other 2 are in similar places.
That 3rd peach is diabolical.
But once you find it, you gotta admit it was pretty clever... (^ω^)
It was driving me insane lol. And then I saw it. (0)(0) Felt like one of the greatest achievements I've had in gaming lol. Was beyond clever...was a 4000 IQ move you did there Kana!
I can t find the last hidden Peach i sawn 2 , One in the preference menu and that One in the menu Quick menu bit i can t find the last one
I'm also stuck on this one x_x
Missing the second to last "Bedtime Butt" as well.
For the second to last Bedtime Butt (Page 4, 1st image), Reina needs to have a good and bad lesson in the same day. ML:Good & AL:Bad or the reverse.
During punishment, choose Large Paddle --> Naked.
Version 1.0 (18 achievements in total) was never uploaded or available to download on itch. Version 1.0 was only available through other unofficial channels.
Kindly go seek assistance in the thread where you downloaded the outdated version of this game for free.
怎么解锁所有成就?
目前还没有 “全部解锁 ”功能。但它很可能会出现在下一个热修复中。
Does the bikini present have any animation scene or just dialog foreshadowing the ending? Love the game!
冲击特效(白光闪烁)有些晃眼睛
屁股的物理引擎过于柔软,摆动幅度有点过大
或许以后的某个游戏中惩罚动画可以弄成自由视角和调整速度力度等参数
簡單來說 做不到
cant seem to find one of the five endings
Which 4 do you already have unlocked?
averege, bad, naked, good
For the last one, it's a bit tricky, but you need to punish Reina 3 times when she has a Morning: Good, Afternoon: Good lesson. After punishing her 3 times, it will trigger the ending you want.
thank you!
Just got the game. Super excited to try it out!
Have fun! I envy those who get to experience it for the first time!
Having a blast with game. Seemingly only getting naked and bad ending so far. Trying to get that good ending! I think I almost had the good ending. I have a feeling I was a single point off from it! Makes me wish I was on a desert island getting spanked and sent to the corner while being forced to read and take naps in between!
If you are already getting the naked ending and not the good ending then you need to stop being so efficient and let Reina slack a little! The naked ending requires near-almost maxed-out stats!
I had 100 in every stat but one and I figured I didn't get good ending because of that lol. I've had two endings where I get stuck on the island and mainly naked endings. Here I've been trying to prefect the scores lol.
Great work Kana! I bought the game yesterday and am loving being a strict mentor for Reina!
Really glad you enjoyed playing! Thanks again for the support!
这是很棒的游戏,kana老师的每一部作品我都有游玩,无一例外都是制作很精美,我非常喜欢,这很值得购买,同时期待kana老师的下一部作品!
我很高兴你喜欢它!感谢您对游戏的支持。
Nice game. I wonder how can I find the last peach, I'm so curious about the secret reward...
Absolutely love it! If you liked Kana Sensei, you should definetely give this one a try. It's fantastic as it is and has a lot of potential to grow with futute updates. For example, I'd absolute love the idea of adding some more students/personalities to choose from and perhaps customizable starting outfits.
Please buy and leave a generous tip so we can all hopefully see more high-quality content of Kana Sensei in the future. :-)
Really glad you enjoyed it! I'm hoping that I can add more DLC updates in the future!
I'm always happy to see new games, particularly from good game developers. Having said that, I strongly dislike the new art style to the point that I even quit playing Kana Sensei at day 4, so this is a "no" for me.
new game!