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I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over

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App ID 3938400
App Type Game
Developer
Publisher WaterBears423
Supported Systems Windows
Technologies RPGMaker Engine
Last Changenumber 31479470
Last Record Update 4 October 2025 – 11:37:19 UTC ()
Release Date 2 October 2025 – 03:21:09 UTC ()
❓ 64.08%
2 reviews
0
In-Game
🎲 RPG 🗺️ Adventure 🌸 JRPG 🗺 Exploration 🔞 Sexual Content

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...

Additional Information

Developer Hoi Hoi Hoi
ReleaseState released
Publisher WaterBears423
Store Release Date 2 October 2025 – 03:21:09 UTC ()
osarch empty string
community_hub_visible Yes
Social Media https://x.com/hoi0609
Primary Genre Adventure (25)
Store Genres Adventure (25), Indie (23), RPG (3)
Store Asset Modification Time 5 September 2025 – 04:04:27 UTC () (1757045067)
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osextended empty string
name_localized
tchinese明明迷上了冷嬌的炮友但她卻帶她的爆乳姊來了
japaneseクールなセフレに惚れたのに彼女が爆乳姉を連れて来た
Detected Technologies (?) RPGMaker Engine, NWJS SDK, NodeJS SDK, Vorbis SDK
restricted_countries CN,DE,SA
China, Germany, Saudi Arabia
Content Descriptors Some Nudity or Sexual Content (1), Adult Only Sexual Content (3), Frequent Nudity or Sexual Content (4), General Mature Content (5)
controllertagwizard Yes
First seen on SteamDB 7 August 2025 – 01:59:35 UTC (), in changelist #30459387
Content Descriptors (Including DLC) Some Nudity or Sexual Content (1), Adult Only Sexual Content (3), Frequent Nudity or Sexual Content (4), General Mature Content (5)

Supported Languages

3 Languages Interface Full Audio Subtitles
Traditional Chinese Yes Yes
English Yes Yes
Japanese Yes Yes

Tags

🎲 RPG 🗺️ Adventure 🌸 JRPG 🗺 Exploration 🔞 Sexual Content 🏽 2D 🌸 Anime 👾 Pixel Graphics 🤡 Comedy 🍑 Nudity 🌱 Indie 😃 Funny 📚 Story Rich 👤 Singleplayer 🫣 NSFW

Categories

Single-player Family Sharing Steam is learning Adult Only

Assets

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Assets
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timestamp2 October 2025 – 03:21:07 UTC
Trailers
971677 ↴
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timestamp1757057474

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