もっと 姉、ちゃんとしようよっ！

Souma goes to an all-boys school by himself in Hokkaido. One day, he received a call from one of his older sisters, telling him that their father had become sick and collapsed. He quickly returns to Hakkakubashi and seeing his five downcast sisters and sickly father, he decided to stay to take care of his father.

[From Hau~ Omochikaeri!]