After returning to her hometown to begin her teaching career, Natsukawa Machiko crosses paths with a group of unruly students during her morning commute. They ignore her warnings and subject her to unwanted advances, but she escapes and reaches the school. To her dismay, she discovers they belong to the class she has been assigned to teach, and the harassment resumes inside the classroom. Just as the situation intensifies, Uoi steps in to shield her, though his position as the group’s leader stays concealed.