I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over
Kosuke and Sana met at university, exchanged their first experiences, and became FWB. They started to live in a new apartment together. But Sana was not his only roommate; her busty sister, Aira, was also there. Whenever Kosuke and Sana had sex, Aira would always join in. It made Kosuke confused...
Last Updated: 10/8/2025
| Steam Price | $7.99 |
| Release Date | 10/1/2025 |
| Developer | Hoi Hoi Hoi |
| Publisher | WaterBears423 |
| Steam App Id | 3938400 |
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over
Kosuke and Sana met at university, exchanged their first experiences, and became FWB. They started to live in a new apartment together. But Sana was not his only roommate; her busty sister, Aira, was also there. Whenever Kosuke and Sana had sex, Aira would always join in. It made Kosuke confused...
Last Updated: 10/8/2025
- Windows
- Mac
- Linux
About I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over is a RPG, Adventure, and Indie game developed by Hoi Hoi Hoi. On 10/1/2025, it was released on the Steam Store by WaterBears423.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
According to Steam’s category system, I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over supports the following features:
- Partial Controller Support
- Single-player
- Family Sharing
From the Steam community, I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over has been tagged with the following user tags:
- JRPG
- Story Rich
- Pixel Graphics
- RPG
- Comedy
- Nudity
- Sexual Content
- Funny
- Anime
- Indie
- NSFW
- Adventure
- Singleplayer
- 2D
- Exploration
Related Packages
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over is referenced by 1 package in the Steam Store. A package (or sub) is simply an item that can be purchased on Steam.
| Name | Price | Actions |
|---|---|---|
| I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over | $4.79 | View |
Supported Languages and Localizations
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over is available in 3 different languages with varying levels of support for the in-game interface, audio, and fully translated subtitles.
| Name | Interface | Audio | Subtitles |
|---|---|---|---|
| Chinese (Traditional) | Yes | No | Yes |
| English | Yes | No | Yes |
| Japanese | Yes | No | Yes |
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Soures & References
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I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over data has been sourced from:
- Valve Corporation. (2025, October 8). I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over on Steam. Steam Store.
- Valve Corporation. (2025, October 8). I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over. Steam Community Hub.
- Hoi Hoi Hoi. (2025, August 20). I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over. I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over.