The storyline revolves around a second year high school student, Riku Aoba, who has just recently transferred to the Tsumugino Private High School (つむぎの高校の自由/Tsugumi no Kōkō no Jiyū) because of his father's job, where he notices, upon joining, several unique and funny occurrences, often being the target of a series of events and races administered by the student council and its fun-seeking president. The headmaster's secretary controls the school while espousing the virtues of academic freedom, the teachers are even stranger than normal teachers, and half the student body is walking around with animal ears on.

On his very first day, Riku is unfortunate enough to find himself at the center of the student council's latest event, which has him running for his life. He meets three beautiful girls: Sayuri Amamiya, Tsukasa Kasuga and Mina Yayoi, with numerous fateful events happening along the way. All this on top of the normal high school rigor of popularity contests, crushes, and homework makes it unsure whether Riku will be able to survive this new school.