あらすじ
She’s a big sister with an attitude, and every time she opens her mouth, it’s all just insults and negativity! However, her little brother has had enough, and he’s got a plan to turn her into the cute, honest sister he knows she can be! To make it work, he’ll first have to take her down a peg or two…
あらすじはAniListより（英語）。
プレビュー
本作のPV。