When Nao's parents were transferred overseas, she ended up taking care of her younger brother Taro. Perhaps because of the age difference, she treated him more like a parent than a brother, and she spoiled him a little. One day, the soccer club lost the prefectural tournament because of Taro, and as a sign of regret, the members of the club tried to make him shave his head, but... When Nao tried to stop them, the members demanded that she shave his head instead. For the sake of her cute little brother, Nao offered her seductive body to them...