Natsume, a teacher, had a problem. Yuta Aoi, who moved to Natsume's class six months ago, was the source of that trouble. Natsume was in a difficult situation after receiving repeated guidance from the school as a homeroom teacher to Aoi, who is a floating presence in the class and often causes problematic behavior. Natsume believed in Aoi's conversion, saying, "I'll definitely rehabilitate it." However, his expectations were betrayed, and Natsume, who fell into his tactics, was raped.