Our MC, Yuma Oda, is just ordinary highschooler who about to graduate. One day in the middle of class, an unknown pop up appeared on his phone screen, a smartphone app called Hypnos, without knowing it the app registered Yuma as a member. At first he didn’t look interested with the app and about to remove the app from his phone until he tested the app on the gyaru of the school, Fujimiya. A dream come true! He can’t believe that the app actually worked! with this he can dominate the gyaru of the school! but he was seen by the female student council when doing it, he was being followed and eventually dragged into student council room. She wants him to repent his doing, but she didn’t realize that she’s going to be his next target.