Nozomu is on a secret mission! After convincing his identical twin brother, Saku, to switch places for a day, Nozomu goes to his brother's school and confronts his enemy in the classroom! Meanwhile, Saku must memorize everything about his brother's school life and classmates so he can fit in without drawing attention to himself. Everything appears to be going alright, until Nozomu's close friend, Yoji Osawa, starts making some more than friendly gestures toward Saku! Afraid of blowing his cover, Saku goes along with it… What could possibly go wrong?