This year's 17th issue of Futabasha 's Manga Action magazine announced on Tuesday that Shūzō Oshimi is ending his Inside Mari ( Boku wa Mari no Naka ) manga in the magazine's next issue, which Futabasha is publishing on September 6. The final chapter will have a color opening page.

The manga follows an "angel-like" beautiful high school girl with a certain secret she has been hiding from everyone, and an idle shut-in young man; the highlight of his day is seeing Mari at the convenience store. The story begins as Mari wakes up in her room, but something feels amiss about the room and even her own body.

Oshimi launched the manga in Manga Action in March 2012. Futabasha published the manga's eighth compiled book volume on May 9. Crunchyroll is releasing chapters of the manga as they are released in Japan.