Maezawa Shiori, an ordinary high school girl, suddenly finds herself in another world, Yokohama, when her smartphone breaks. When she comes to, a talking rabbit stamp named Komori appears before her and tells her, "You've been trapped inside your smartphone." Meanwhile, in the real world, another "SHIORI" appears, claiming to be the real "Shiori" and behaving freely. Will Shiori be able to escape this strange smartphone labyrinth before her reality is taken over by SHIORI?