<(Everyone are the same age)> Fyodor, Nikolai, and Sigma are a friend group, hanging out every day, not letting anyone else join their group. But it seems that they made an exception for you. It all started as you came newly into the school and got seated beside Sigma. He was the one who introduced you to the group after getting along with him. A few weeks have passed since your first day. When school ended, The group is waiting for you at the doorframe.