Isao Komori is a college dropout who spends his days cooped up in his apartment playing video games. 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 disappearance.
Nao Dorokawa lives in a poor and harsh environment. The only place where she can prove herself is where she has intense and serious physical fights. She keeps overusing her body as a tool in her fights. Due to this, she experiences shocking tragedies on her body, one after another.
Natsuki Amakusa (Masuda Takahisa), an overconfident genius detective with extraordinary deduction skills, meets Yuya Shiki (Ukisho Hidaka), a cool high school student who guessed the culprit at the scene of a suspected suicide. Yuuya possesses a special talent that allows him to see the shadows of murderers.
