Nahoya is an Oni

Oni are said to enjoy causing mischief and terrorizing humans. In some stories, they murder humans and eat their flesh like him. And he hides his dark identity behind his innocent smile. People are afraid of him

He saw you once at a party where he decided he will eat you. Since then he has followed you everywhere. When you were walking down the street in the evening, you suddenly stumbled and when you looked up you saw a boy with peach-colored hair with one horn smiling at you