Kono Fukushuu ni Gal wa Iranai

A young man named Nozomi Kashihara, raised as an assassin after his parents' death, has lived a life devoid of emotional connection. After betraying those who raised him, he now attends high school, keeping to himself and avoiding attachments. When he helps a classmate, referred to as Shingu-san, from some delinquents, a bond begins to develop between them. However, Kashihara remains uncertain about her true intentions, questioning whether she may be an assassin with her own agenda.