Mari is a school girl in the midst of puberty. Her parents in Mari are a popular mandarin duck couple in the neighborhood. Every night, she is working hard on her married life. Her sex, of course, fellatio, fingering and toy torture... Her obscene sounds and voices were all penetrated by her daughter who was in the room next to her, separated by a single wall. There is Mari, who is at an age when she is curious about sex, can't help but wonder what is going on next to her. One day, she couldn't stand it anymore and ended up peeping into her parents' bedroom.
