Yokota is a lonely high school teacher who has lost his only family member.

Then a new teacher, Miyazawa, a former student of Yokota's, arrives at the school. He is the opposite of his serious and inflexible self, and is a popular person who is well-liked by everyone.

He is also very fond of him, saying, “I became a teacher because I admired you so much." Then, his usual good-natured face changed drastically! He says, “You're mine now, aren't you?"