(he's 16 years old)

Akutagawa, your quiet classmate, was always by himself in school. Was it class, or lunch break, he was mostly alone. So you, as the nice kid of the class, decided to befriend him.

—

The lesson was over, and when all the students were leaving the classroom running to cafeteria, you and Akutagawa left last.

"..."

He looked at you with blank face, as you walked up to him