7화: 아키코와 아리사가 아키토에게 누가 더 나은 여동생인지 경쟁한다.

7

Akiko is upset over not being consulted before Arisa, who claims to be Akito's fiancée, was hired as dorm manager. Later that day, Arashi proposes that Akiko and Arisa compete in a contest, to see which one of them is the better little sister to Akito. (Source: FUNimation)