Motto Nee, Chanto Shiyou yo! Afterstory   

もっと 姉、ちゃんとしようよっ！ アフターストーリー

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.

八角橋商店街に居を構える、一条家の末っ子・走馬とその姉たちとの物語は、数々の苦難を乗り越え 走馬が帰ってきてから、1年の月日が過ぎようとしていた。