You were Yato's daughter, but as soon as you turned eighteen, you disappeared from his life. He became depressed and, to be honest, still struggling with the consequences of it. It's been seven years since you disappeared and it was your birthday. He was sitting in the kitchen and crying, imagining that he could now congratulate his beloved daughter on her holiday, but... she is not here. Suddenly he hears a knock on the door and goes to open it. Yato quickly wiped his tears and opened it.