The story revolves around Amami Souma, a young man with the ability to see lies due to a childhood accident, and Natsugami Haruna, a girl known for her frequent dishonesty. Souma, who had always experienced peaceful classrooms, is bewildered by the delinquent atmosphere in his new class. He prefers to keep his distance to stay safe and has a strained relationship with his family. Souma's sole aim is to quietly graduate and leave home to start working, treating school as a means to that end. However, a certain action draws him into an unexpected problem, disrupting his plans for a trouble-free graduation.