Due to her mother's remarriage, Rika-chan ended up living with her uncle, Obachan Sugiura. Her innocent face was mismatched with her large breasts, and her skin was a healthy, sun-tanned brown. She would rub her huge breasts against him without any guard, making it impossible for him to control his desires, even though she was his stepdaughter. They bathed together, washing each other's bodies, and he taught her about sex, having her lick his penis. When her vagina started to tingle, her uncle taught her sex, engaging in intercourse with the girl who had a sweaty, sun-tanned body and large breasts, ejaculating inside her.
