My Younger Stepsister Got A Boyfriend. I Was Crazy With Envy, So I Fucked Her And Creampied Her On My Break. - Rion Izumi

妹に彼氏ができた。嫉妬に狂い休み時間に中出しし続けた。 桃色かぞく VOL.8 泉りおん

Mayu, a younger sister, and Kenji, her older brother, attend the same school. The two had a secret physical relationship. However, the younger sister acted distant toward her brother in public—a so-called 'tsundere.' One day, Kenji heard a rumor that Mayu had gotten a boyfriend in her class. Overcome with jealousy, Kenji dragged Mayu around and had insatiable creampie sex with her all over the school...