Mayonaka no X Giten

Hiroki, whose older sister Yui is a self-centered NEET shut-in, grows tired of looking after her and snaps. Muttering that he wishes they were not related, he visits a mysterious website that promises to let users enter someone else’s body if they make their own body available in return. Skeptical but curious, Hiroki tries it and wakes up in the body of popular idol Mikuriya Mikuni. As Hiroki spends time as Mikuni, he becomes caught up in uncovering a secret about her. When he tries to return to his own body, the person now occupying it tells him that something outrageous has happened. Hiroki must face questions about what happened to his body and what Mikuni is hiding.