Nagatoro is a freshman in high school who loves teasing and torturing her older male classmate (Senpai).

What is her motivation and why does Senpai put up with her?
Does Nagatoro just want to create misery for Senpai? Or maybe she secretly likes him?

New year, new nuisance! Nagatoro and Senpai open the year at a shrine famous for matchmaking, hit the slopes for a school ski trip, and do some sparring at an MMA gym. But will these new events bring Nagatoro and Senpai closer together, or will Nagatoro's chaotic kidding spell K.O. for their pairing.