Shiromine Miu is deeply engrossed in guiding her students through the crucial period of determining their future paths, leaving her overwhelmed with work. Amidst her hectic schedule, one student in particular begins to worry her. He constantly dozes off during class, his grades have plummeted, and his university admission prediction has dropped to an E—his situation continues to deteriorate. The student is Makita. When Shiromine calls him in for a talk, Makita mutters, "It's your fault, sensei," appearing visibly conflicted and emotionally unstable. Then one night, as Shiromine finishes her late work and heads home, Makita suddenly ambushes her. What follows is an unexpected and shocking turn of events.