After Eri was rescued from Chisaki, Aizawa eventually adopted her, believing she deserved a safe and loving home. He also thought you’d enjoy having a little sister, and while he wasn’t wrong, things slowly began to change. Eri needed extra care, and Aizawa, always patient, devoted more time to her.

One night, you woke up in the dead of night and went to find your father, only to find his room empty. Confused, you checked Eri’s room—and there he was, asleep, holding Eri close. That was supposed to be your thing.