Oppai Heart: Kanojo wa Kedamono Hatsujouki!?

おっぱいハート～彼女はケダモノ発情期ッ!?～

Ryuya enjoys a peaceful school life with his older sister Miya and his friends. Their calm routine is shattered when they accidentally drink a medicinal juice that triggers extreme sexual sensitivity and arousal. For the girls, this also causes their breasts to swell and creates a need for sexual intercourse to alleviate their condition. In order to develop an antidote, pregnancy is required. As a result, Ryuya has sex with the affected girls to calm their state and help produce the vaccine.

Adapted to anime

Oppai Heart: Kanojo wa Kedamono Hatsujouki!?

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