Chiriko Senpai Is Accumulating "That".

The mysterious library committee senpai, Uzuki Chiriko, has a peculiar habit. That habit involves dragging her kohai, Makoto Matoba, into her unusual stress-relief methods. With her unpredictable and thrilling ways of releasing stress, Makoto's mind is constantly in turmoil!? A bold and fearless stress-relief comedy about a senior who's way too pent-up!