Ichika, a remarkably reserved beauty, embarks on high school life only to find herself isolated without any friends. Unexpectedly, the notorious ex-delinquent Yuuya Yotsukado engages her in conversation and leads her to a surprising karaoke outing. Surprisingly, his intentions diverge from his dark reputation as he returns her lost item. As they delve into peculiar after-school strategy sessions, an unlikely alliance forms, propelling them towards realizing their shared aspirations.