前回に引き続き“公式お姉ちゃん”の座をかけて熱いバトルが勃発！
しかしグダグダ展開で企画崩壊の危機！？
果たして激戦の中、勘違いお姉ちゃんを抜け出し公式お姉ちゃんになるのは誰だ？
Following on from last time, a heated battle breaks out for the title of "official big sister"!
However, things are going awry and the project is in danger of falling apart!
In the midst of this fierce battle, who will emerge as the misguided big sister and become the official big sister?
