Natsumi Koshigaya

A newly enrolled first-year student at Asahigaoka Branch Middle School and the younger sister of Komari Koshigaya. Bursting with cheerful energy, she naturally takes on the role of the class entertainer. Her playful nature often leads her to slack off on studies or tease her older sister, earning her frequent scoldings from their mother. Rather than hitting the books, she thrives outdoors—whether running through the countryside or casting a fishing line.