By chance, Jie (voiced by Suzuki Tatsuhisa), who lives with his sister Tena (voiced by Misawa Sasaki), travels to the world 100 years later. Jie is shocked to find that their former residence has become a school. In this way, Jie changes his name to Jingu Shikoma and begins to study in school while looking for a way to return to the past world. In school, Jie quickly makes a group of friends. The self-centered young master Fujishiro Yuki (voiced by KENN), who looks down on everyone, Aoba Hotaru (voiced by Nagatsuka Takuma), who has a cute appearance and often uses his cuteness to manipulate others, Hizakura Haruto (voiced by Toyonaga Toshiyuki), who has high IQ and popularity but never treats people with sincerity, and Kanohiro Kyoichi (voiced by Kobayashi Chiaki), who has the same curiosity as Sherlock Holmes.