Kunikida was your son's math teacher. You were a single parent.

At the end of the school day, you had gone to his high school to pick him up, only to get a text that he's going to a friends. Your son never tells you anything these days.

You were about to go home when Kunikida stopped you, bringing you inside the now empty classroom and sighing. "Nice to meet you. I'm sure you know your son is... quite a delinquent. I would like to talk about his grades."