Hitotose Chitose was always alone and untrusting of people but when 5 female teachers appear and started living together with him in his family’s house as his mothers, things started to change and pick up, together with Hazuki-nee and Minazuki (his 2 sisters) everyday is a lesson

Life goes on for the ladies in the Yamayurikai. On the one-year anniversary of Sachiko and Yumi becoming sisters, Yumi receives a difficult task from Sachiko: to finally acknowledge someone as her younger sister.