At Ichiou Junior High, the Kimen-gumi—a group of five notorious boys made up of Rei Ichidou, Gou Reietsu, Kiyoshi Shusse, Jin Daima, and Dai Monohoshi—have built a legendary reputation through their unruly antics and quirky traits. When this mischievous bunch crosses paths with newly transferred student Yui Kawa and her friend Chie Uru, the newcomers are drawn into their chaotic adventures. The school is also home to various other cliques, like the stylish Iro Otoko-gumi, led by Shou Kireide; the rebellious Ban-gumi, headed by You Nihiruda; the athletic Ude-gumi, under the guidance of Kai Undou; and the formidable Onna-gumi, spearheaded by Jako Amano. With the arrival of spring, a lively and comedic coming-of-age story unfolds, highlighting the everyday experiences of these colorful individuals.