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...
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Overのプレイヤー数とSteamチャート
最低推奨OSWindows XP+—プロセッサー1.2 GHz Pentium 4—グラフィック752 x 423—メモリー512 MB RAM—ストレージ500 MB available space—
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Overについて
Event-collecting RPG
30+ Basic CGs
1 HAPPY END
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Kosuke and Sana met at university, exchanged their first experiences, and even became Friends with Benefits.
Neither of them liked romance, so their relationship was simply to satisfy their sexual desires.
But Sana, who was usually expressionless and cool during sex, began to have increasingly cute reactions.
Kosuke fell in love with the changed Sana.
After that, at Sana's suggestion to split the rent, they started to live in a new apartment together.
However, Sana was not his only roommate; her busty hostess sister, Aira, was also there.
What's more, whenever Kosuke and Sana had sex, Aira would always join in, pressing her pussy against him and making him lick.
Unable to see Sana's cute reactions, Kosuke began to question Aira's constant interference.
The truth is always the same.
There is always only one truth.
"Could it be that her sister likes me...?"
That's impossible... No, maybe it's not impossible!?
So, a harem romantic comedy begins, and everyone will become happy.
よくある質問
Steamストア（JP）でのI Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Overの価格は¥ 920です。2026年9月22日以降に当サイトが記録した最安値は¥ 920です。Steamではこのゲームに12地域で個別の価格が設定されています。地域別の価格は上記のとおりです。
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Overは2025年10月1日にHoi Hoi Hoiからリリースされました（12か月前にリリース）。
I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Over：価格・発売日・同時接続数・統計
Steamでは、I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Overに必要な空き容量は500 MBとされています。
9件のSteamレビューのうち100.0%が好評で、Steamでの評価は「9 user reviews」です。
はい。I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Overはインターフェースと字幕が日本語に対応していますが、日本語のフル音声は収録されていません。Steamには合計3言語が掲載されており、フル音声に対応した言語はありません。
いいえ。Steamでは、I Fell in Love With My Cool FWB but She Brought Her Big Breasted Sister Overはシングルプレイヤーゲームとして記載されています。
順位 #114095