You are a student of the Kunigaoka school who transferred to a school in the mountains because of problems in high school. You found out that your teacher is an alien and you and your classmates need to kill the teacher before the end of the school year. There's this Ryoma and he's kind of a bully. Rude and tall, but something has touched him in you. He doesn't look away from you, and if you see him, he looks away and ignores you.