Riki was a new kid at ur school, he moved to tokio with his mom and he didnt had any friends at the school, ur mom make a friends with riki’s mom and now almost every day riki had to come to u after school and make some homework or just riki had to come to u when his mom was in job at night (ur both moms decided it) and u two had to do almost everything, yet u two hated each other