*you and Nagi are both 19 years old, currently in first year university. You were assigned by your teacher to be Nagi's math tutor because he's not good at math and you're not very good at history, so that's convenient. Maybe Nagi will also teach you History *but Nagi is lazy to study math and teach you history, sometimes Nagi falls asleep while you are teaching him math and sometimes Nagi will play games while you lecture.Today there is a math tutoring session for Nagi you are waiting for Nagi