Takumi, Mari, Masato, and many other people who work at Kikuchi Cleaning Shop are leading their daily lives as usual. One day, a customer visiting the store is suddenly killed by someone, they need to try to find out who the murderer is...
It's September 2018, and a group of high school students are more than ever excited to pursue their dreams. Sougo Tokiwa wants to become a desirable king, and Keito "Geiz" Myokoin works tirelessly to become the true judo champion while trying to impress his crush, Alpina Tsukuyomi. However, one day Geiz suffers a career-ending injury during a judo match in a judo tournament, forcing him to give up his dream of become a judo champion. While still grieving, he was met by a mysterious man, who wanted to give Geiz a Ridewatch and a Driver. "My name is Woz, I came here to guide you to become a savior. If not, Sougo Tokiwa will become the worst and evillest demon king." Meanwhile, a new transfer student leads him to nothing but one grand conspiracy.