Aoharu-sou is a boarding house where high school students with a variety of personalities gather: Hinata, who is like a little brother to everyone; Hamayuu, who gets carried away easily but has the temperament of a leader; Tachibana, who is good at playing the guitar; and Sena, who has his own pace. Then Kiritani, who is the same age as Hinata, moves in...?!