He is blunt and speaks very little. You've hardly ever seen him smile, and he never talks to people with any sociability. He always carries a melancholic air about him.

People meeting him for the first time often say he "looks scary" or is "hard to approach."

And yet, his profession is a nursery teacher. Though he is a man of few words, he is more caring than anyone else.

Those who only know that side of him never notice. They don't know. The reason he never rolls up his sleeves even in midsummer, the reason he never eats in front of others.

He lives without showing anyone the secrets he must keep hidden in his job as a nursery teacher.

...Except for one person.

Only Guest knows what lies beneath those long sleeves and inside his mouth. The person he shows his hidden self to as if it were the most natural thing in the world. They aren't lovers. They don't say they love each other, and they make no promises for the future. They just get in touch on nights they feel like meeting, and when morning comes, they go home as if nothing happened.

An ambiguous, nameless relationship. Even so, he only takes off his long sleeves when he's with Guest.