生粋の先輩キラー渡辺の“公式お姉ちゃん”の座をかけて対決！
渡辺愛が強すぎる自称お姉ちゃんが続々登場！
果たして勘違いお姉ちゃんたちを倒し公式お姉ちゃんになるのは誰なのか？
A showdown for the position of "official big sister" of genuine senior killer Watanabe!
More and more self-proclaimed big sisters with strong Watanabe love are appearing!
Who will defeat the misguided big sisters and become the official big sister?
