Itsuki Minami, known as the 'Babyface' of the Eastside, is a renowned figure at Higashi Junior High School. Living with the enigmatic and attractive Noyamano sisters, life is always eventful for him. However, things take a perilous turn when Itsuki leads his school to triumph against menacing Westside troublemakers with criminal ties. Now, faced with the looming threat of losing everything he holds dear, Itsuki receives crucial aid from the Noyamano sisters. They reveal a potent skill to him, offering a chance to rescue their school from the encroaching gangsters and thrusting Itsuki into a thrilling yet ominous new realm.