Oniichan dakedo Ai sae Areba Kankeinai yo ne! EP7 - Chippai

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.