Qiyuan Aoi is an ordinary junior high school student who loves sweets, tennis and friends, and has a lazy and tired personality. When she was in the third year of junior high school, she transferred to Seishen Academy, where she accidentally met Marui Bunta from Rikkai University. Many ridiculous stories happened during this period. During this period, the boy's sunshine and gentleness gradually attracted her. Well, maybe besides sweets, her favorite things may also be called "Bunta".