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KN Ren'Py [Koikatsu] ImoTsuyo: If It's for My Young Sister, I'll Be Stronger [v0.22] [otaku_argento]

Dean

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Allow others to update?
  1. yes
Developer Name
otaku_argento
Developer Links
Version
0.22
Latest Update
Jun 3, 2025
Release Date
Jun 2, 2025
Language
English
OS
  1. Windows
  2. Linux
  3. MacOS
ImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Cover.jpg

Overview:
After her mother's death, Hana Aochi went into a deep shock leaving her expressionless, does not laugh or cry.
But keep saying and doing what she want as she was before. Saigo, her older brother, has been taking care of her ever since.
He wants to get his young sister back to normal, but it won't be an easy task.​

3DCG, Ahegao, Blowjob, Boob-play, Cheating, Creampie, Cunnilingus, Defloration, Facial, Handjob, Harem, Incest, Kinetic Novel, Male Protagonist, Romance, School setting, Vaginal-sex, Wholesome
Extract and run.
v0.22
- 1 New individual route game mode and first chapter: Hana pilot intro.
- 2 New romaji terms and their voiced pronunciations.
- 6 New farewell events. 176 in total.
- 2 New sprites.
- 1 New trophy.
- 9 New CG Images (2 of them animated, and a third animated one but patron only).
- 4 New CG-Style trading cards for the patrons' mini game called Waifu Card Master.
- Improvements in library (Now Hana has canon and individual route gallery separately).
- Improvements in dialogues.
- Improvements in FAQ: New questions and new answers, some explaining about mods/plugins and news about the new game mode.
- Improvements in credits: Updated patrons.
- Updated extras menus.
- Updated tutorial.
v0.21
Release: 2025-04-02
- 1 New canon route chapters. 37 in total.
- 2 New backgrounds.
- 4 New romaji terms and their voiced pronunciations.
- 8 New farewell events. 170 in total.
- 10 New sprites. One of them is a husbando making his appearance debut.
- 1 New trophy.
- 6 New CG Images (One of them shortly animated).
- 12 New cards for the patrons' mini game called Waifu Card Master (8 of them are CG-styled/detailed) .
- Improvements in library (Updated profiles info and added the new male character).
- Improvements in places: New backgrounds added with their respective info.
- Improvements in calendar.
- Improvements in dialogues.
- Improvements in FAQ: New questions and new answers, some explaining about mods/plugins and news about the new game mode.
- Improvements in credits: Updated patrons.
- Improvements in study: Added the new sprite of the debuting male character.
- Updated extras menus.
- Updated tutorial.


v0.20:
Release: 2025-02-23
- 2 New canon route chapters. 36 in total.
- 6 New backgrounds.
- 6 New romaji terms and their voiced pronunciations.
- 11 New sprites. One of them is a new waifu, debuting in this version.
- 2 New trophy.
- 15 New CG Images.
- 1 New sound effect.
- 8 New cards for the patrons' Mini game called Waifu Card Master.
- Improvements in library (Updated profiles info and added the new waifu).
- Improvements in places: New background added with respective info.
- Improvements in dialogues.
- Improvements in credits, having a new menu to mention special patrons.
- Improvements in main menu. 2 New girls added as main menu selectable waifus.
- Improvements in study: Added the new sprite.
- Updated extras menus.
- Updated tutorial.

v0.19.1: NO STORY NEW CONTENT, READ SPOILER.
Release: 2024-11-29
- Just the results of the third annual poll.
If you already download v0.19 it's not necessary to download v0.19.1 unless you wanna know the new poll results of this year. Of course, old v0.19 links will be deleted and updated for new players who come from v0.18 can directly play v0.19.1.

v0.19:
Release: 2024-11-22
- New button to vote in the third annual poll in official links; at the end of the game, and in voting menu.
- 1 New canon route chapter. 34 in total.
- 1 New background.
- 3 New romaji terms and their pronunciations.
- 1 New sprite.
- 1 New trophy.
- 7 New CG Images.
- 3 New sound effects.
- 2 New emojis on WanChat message-like app.
- 6 New farewell events (162 in total).
- 1 New card for the Mini game called Waifu Card Master.
- Improvements in library (Updated profiles info).
- Improvements in places: New background added with respective info.
- Improvements in study: Added the new sprite .
- Updated extras menus.
- Updated tutorial.

v0.18:

Release: 2024-10-27
- 1 New canon route chapter. 33 in total.
- 2 New backgrounds.
- 2 New romaji terms.
- 6 New sprites, *1 New character debuting.*
- 1 New trophy.
- 5 New CG Images (+1 old reworked).
- 6 New farewell events (156 in total).
- 11 New cards (6 of them in CG style for SR rarity) for the Mini game called Waifu Card Master.
- Improvements in library. (Updated profiles and 3 new ones, but 2 of them are for patrons since they can be unlocked by playing Waifu Card Master).
- Improvements in places: New backgrounds added with respective info.
- Improvements in study: Added the new sprite .
- Some random bugs fixed.
- Fixed some dialogues and its translations for chapters 29, 30 & 31.
- Updated extras menus.
- Updated tutorial.

v0.17:
Release: 2024-08-25
- 1 New canon route chapter. 32 in total. (31 in number of chapters, there are 15.5 and 28.5, making 1 by having 2 half chapters in count, so... 32 in total).
- 1 New background.
- 6 New romaji terms.
- 1 New sprite.
- 1 New trophy + 1 for patrons.
- 1 New sound effect.
- 11 songs now with name.
- 1 New CG Image.
- 1 New Mini game called Waifu Card Master. A collectible mini game about trading cards with a buy and sell system with in-game money. More than 220 cards to collect in 4 rarities: Common, Uncommon, Rare and Super rare. It comes with a 3D viewer making you able to rotate and position the card in the screen.
- Improvements in library. (Updated profiles).
- Improvements in extras menu: Added a music gallery system making you able to have your favorite songs to hear them outside of any dialogue play mode. Random and repeat systems as well.
- Improvements in places.
- Improvements in study.
- Some random bugs fixed.
- Updated extras menus.
- Updated tutorial. Here you can play the mini game if you're patron.v0.16.1:

Release: 2024-07-06
- New way to check internet connection, to avoid a bug that breaks the game when checking a new version.
- Some romaji terms fixed, fixing another thing that break the game.
- Some other bugs fixed.

v0.16:
Release: 2024-07-04
- 1 New canon route chapter. 31 in total. (30 in number of chapters, there are 15.5 and 28.5, making 1 by having 2 half chapters in count, so... 31 in total).
- 4 New backgrounds.
- 5 New romaji terms.
- 6 New sprites.
- 1 New trophy.
- 1 New font.
- 3 New sound effects.
- 10 Old songs were replaced with new ones + 1 new. 11 in total.
- 4 New CG Images.
- Improvements in library. (Updated profiles).
- Improvements in dialogue. (A new chat-like dialogue with history function and 12 custom original emojis).
- Improvements in main menu. Now you can make the menu sprite to be randomly changed every time you open the game. And there's an online update check that Idk yet if it works as it should, but it's implemented.
- Improvements in places.
- Improvements in study.
- Improvements in translation. Both for Spanish and English dialogues.
- Some random bugs fixed.
- Updated extras menus.
- Updated tutorial.

v0.15:
Release: 2023-12-29
- 1 New canon route chapter. 30 in total.
- 2 New backgrounds.
- 6 New romaji terms.
- 4 New sprites. (2 characters making their debut).
- 3 New trophies.
- 3 New CG Images.
- 42 New farewell events (150 in total).
- Improvements in library. (New and updated profiles).
- Improvements in calendar.
- Improvements in FAQ.
- Improvements in main menu. Now you can choose within almost all the female cast to appear as the main menu girl.
- Improvements in study.
- Improvements in place.
- Updated extras menus.
- Updated tutorial.
- Updated poll results.

v0.14 fix:
Release: 2023-11-05
- Improvements in splash screen.
- Improvements in credits menu.
- Improvements in sprites.
- Updated tutorial.

v0.14:
Release: 2023-11-01
- 3 New canon route chapter. 29 in total.
- 2 New backgrounds.
- 13 New romaji terms.
- 7 New sprites.
- 3 New trophies.
- 9 (19) New CG Images.
- Improvements in library.
- Improvements in FAQ.
- Improvements in study.
- Updated extras menus.
- Updated tutorial.

v0.13:
Release: 2023-10-19
- 2 New canon route chapter. 26 in total.
- 2 New background.
- 6 New romaji terms.
- 14 New sprites.
- 2 New trophies.
- 3 New CG Images.
- Added etymology on every character's profile inside library.
- Extras menus updated.
- Updated tutorial.

v0.12:
Release: 2023-10-01
- 2 New canon route chapter. 24 in total.
- 7 New background.
- 15 New romaji terms.
- 23 New sprites.
- 2 New trophies.
- 6 New CG Images.
- Dictionary menu and cell phone dictionary bug fixed.
- Extras menus improvements.
- Updated tutorial.
v0.11:

Release: 2023-09-16
- 1 New canon route chapter. 22 in total.
- Shizuka sprite in studio. Added her profile in library.
- 1 New background.
- 4 New romaji terms.
- 2 New CG Images.
- Updated tutorial.

v0.10
Release: 2023-07-14
- 1 New canon route chapter. 21 in total.
- 39 New farewell events. 108 in total.
- 2 New characters sprites. (One old, and the other have its debut).
- A lot of changes in menus, like extras, options, main.
- Now you can start from the chapter you want with a new option at start.
- Now you can have your prefered waifu in the main menu. (For now there are just 6: Gina, Hana, Hime, Kaori, Mizuki and Rena).
- Updated tutorial.

v0.09:
Release: 2023-04-16
- 2 New canon route chapters. 20 in total.
- Updated tutorial.
v0.08:

Release: 2023-03-12
- 2 New canon route chapters. 18 in total.
- Updated tutorial.

v0.07:
Release: 2022-11-28
- 1 New canon route chapter. 16 in total.
- Updated tutorial.

v0.06:
Release: 2022-11-07
- 2 (+1) New canon route chapters. 15 in total.
- Updated tutorial.

v0.05:
Release: 2022-21-06
- 2 New canon route chapters. 13 in total.
- Updated tutorial.

v0.04:
Release: 2022-20-05
- 1 New canon route chapter. 11 in total.
- Updated tutorial.

v0.03:
Release: 2022-31-03
- 2 New canon route chapter. 10 in total.
- Updated tutorial.

v0.02:
Release: 2022-02-03
- 1 New canon route chapter. 8 in total.
- Updated tutorial.v0.01:

Release: 2022-07-02
- 1 New canon route chapter. 7 in total.
- Updated tutorial.Christmas update:

Release: 2021-25-12
- 1 New canon route chapter. 6 in total.
- Library available.
- Updated tutorial.Demo:

Release: 2021-11-28
- 5 Canon route chapters. 5 in total.
This version was made for the first time with Ren'Py 8.x running on Python 3.9, while earlier versions were made with Ren'Py 7.x. This means the code would probably break, and it's highly recommended to start a new game from this version. The change was mostly forced, since the new animations would make the RAM go wild up to 17 GB and then break the game with both visual glitches and lag. I don't know why this happened since I never had these bugs before, but... it was mostly the fault of the Python version the old engine uses, so please consider starting a new game.

Things to remark: the game will freeze the first time you choose the language. I don't know the reason yet, but it's not crashing, just wait a few seconds. The same thing happens when you return to the main menu, no matter where you're coming from or when you open a profile's intro, or start a chapter or farewell event from events menu. It'll freeze for a few seconds and then work normally again. I know it's kinda tedious, but this might be due to the engine change, so... sorry. I'll try to fix it in future versions. It's not fully tested so it might have bugs.

The game was originally made in Spanish and was auto-translated, so it is highly probable that there are grammatical errors or Spanish words when playing in English. Report that and I will try to fix it as soon as possible.

Some of the plugins are free and others for patrons. Consider to support me on Patreon if you want access to the paid ones.

If you find any bug let me know so I can fix it asap in the first week after the release date, otherwise, the bugs will be fixed for the next version who knows when. Keep an eye on Patreon where I'll tell you when the next poll will be open.


DOWNLOAD

Win/Linux: - - - -
Mac: - - - -

"hnclsg" Fix:
Patch:


unofficial android port + patch (OLD)

ImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-1.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-2.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-3.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-4.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-5.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-6.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-7.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-8.jpgImoTsuyo-If-its-for-my-young-sister-Ill-be-stronger.-Adult-Game-Screenshot-9.jpg
 
Last edited by a moderator:
ImoTsuyo [v0.09] Unofficial Android Port + Patch

Swipe Gestures
Textbox Opacity
Text size scaler
Quick Menu

- 160mb


My Android Ports have a 2nd Persistent save location. So, even if you uninstall the game, the saves will remain Intact.

Saves location: Storage/0011/Game-name


You can also join my discord server for more and support me.



You can also join 0011 discord server



If you like my works please support me.

 
Remove the dead link under the other spoiler and replaced it with a link to lewpatcher for incest patch.
 
I'm not a fan of Koikatsu, but if it's for my younger sister, I'll download it! ;-)
 
It looks cool but my game crashes when I choose the language 🙁
 
can we have a compressed version of this game? i'm running low on storage here...
 
Remove the dead link under the other spoiler and replaced it with a link to lewpatcher for incest patch.
Lewpatcher isn't permitting download from either link
 
update

ImoTsuyo: If It's for My Young Sister, I'll Be Stronger [v0.22]​

v0.22 PLEASE!!! READ THE FAQ AND DEVELOPER NOTES BEFORE COMMENTING AND/OR DOWNLOADING.
Save files from previous versions may not work!!

DOWNLOAD
Mode edit: Links moved to first post.

Changelog:
v0.22:
Release: 2025-06-03
- 1 New individual route game mode and first chapter: Hana pilot intro.
- 2 New romaji terms and their voiced pronunciations.
- 6 New farewell events. 176 in total.
- 2 New sprites.
- 1 New trophy.
- 9 New CG Images (2 of them animated, and a third animated one but patron only).
- 4 New CG-Style trading cards for the patrons' mini game called Waifu Card Master.
- Improvements in library (Now Hana has canon and individual route gallery separately).
- Improvements in dialogues.
- Improvements in FAQ: New questions and new answers, some explaining about mods/plugins and news about the new game mode.
- Improvements in credits: Updated patrons.
- Updated extras menus.
- Updated tutorial.

Developer Notes (UPDATED v0.22. PLEASE READ!!):
This version was made for the first time with Ren'Py 8.x running on Python 3.9, while earlier versions were made with Ren'Py 7.x. This means the code would probably break, and it's highly recommended to start a new game from this version. The change was mostly forced, since the new animations would make the RAM go wild up to 17 GB and then break the game with both visual glitches and lag. I don't know why this happened since I never had these bugs before, but... it was mostly the fault of the Python version the old engine uses, so please consider starting a new game.

Things to remark: the game will freeze the first time you choose the language. I don't know the reason yet, but it's not crashing, just wait a few seconds. The same thing happens when you return to the main menu, no matter where you're coming from or when you open a profile's intro, or start a chapter or farewell event from events menu. It'll freeze for a few seconds and then work normally again. I know it's kinda tedious, but this might be due to the engine change, so... sorry. I'll try to fix it in future versions. It's not fully tested so it might have bugs.

The game was originally made in Spanish and was auto-translated, so it is highly probable that there are grammatical errors or Spanish words when playing in English. Report that and I will try to fix it as soon as possible.

Some of the plugins are free and others for patrons. Consider to support me on Patreon if you want access to the paid ones.

If you find any bug let me know so I can fix it asap in the first week after the release date, otherwise, the bugs will be fixed for the next version who knows when. Keep an eye on Patreon where I'll tell you when the next poll will be open.
 
Last edited by a moderator:
updated to v0.22. enjoy.
 
Update v0.26
SAVE FILES FROM PREVIOUS VERSIONS MAY NOT WORK!!
If it’s your first time playing and you choose the language when starting the game, the game will freeze for a few seconds. It’s not crashing, just wait a bit and it’ll go back to normal.


 
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