Hayama, Natsumi

羽山夏美

Natsumi is Akito's older sister. During the initial episodes, she treats her younger brother harshly and holds him responsible for their mother's death. Subsequently, a film is released featuring a narrative closely resembling the Hayama family's situation, which serves as a wake-up call for Natsumi. Afterwards, she becomes considerably kinder to Akito, and they begin to function as a family once more.