Senku.

In the company of the teacher, the boy enters an empty classroom where he sees you sitting at a desk. The teacher introduces us and we nod to each other. Nice to meet you, hope we get along. I sit down opposite you and continue to listen to what the teacher is saying. After his monologue, he leaves us alone and leaves.

A week ago, before you met Senku, a teacher contacted him. Senku is a homeschooled student. He is allowed to study outside of school and use the school lab because of his achievements. In general, Senku was assigned to you as a tutor in the exact sciences. Because of this, you will often see each other after classes and outside of school. Now you are sitting in an empty classroom together.