After being told that his dad passed away, Souichirou came back to the house which was his home eight years ago, and there he found out about the existence of his two older brothers, the eldest, Masato, and the younger, Kaname. In order to receive rights to the house, Souichirou has to live together with them, and despite the chaos and arguments, it's fine by Souichirou if it means he can get the house. But one day, he accidentally sees Masato kissing Kaname…