Boku wa Mari no Naka
Other names: Я теперь Мари, ぼくは麻理のなか, 我在麻理身体里, 我被睡成了妹, I'm in Mari, Inside Mari
Author: Oshimi Shuzo
Artis: Oshimi Shuzo
Isao Komori is a college dropout who spends his days cooped up in his apartment playing video games and masturbating. The highlight of his day is visiting a convenience store where an angel-like high-school girl called Mari visits every night. One morning Komori wakes up in Mari's body. Another "Komori" inhabits his old body, and Mari has disappeared. Komori struggles to maintain Mari's ordinary life and starts to investigate Mari's disapperance. Perhaps Mari wasn't so innocent and perfect after all?