Masaki's younger sister Manaka sneaks into school to confront Sumika over why she rejected him. Using some pity tactics, Manaka manages to get Sumika to agree to go on a date with Masaki. Come Sunday, Masaki meets up with Sumika while cross-dressing, and Manaka follows them, using a plan to get them together. Meanwhile, Ushio gets a little worried when she cannot get into contact with Sumika. Manaka recommends they go see a romance film, but they end up watching a horror instead. Next, Sumika and Masaki have lunch, though Manaka is unable to sneak love potion into Sumika's food due to her unconvincing waitress disguise. While clothes shopping, Sumika cannot handle the fact that Masaki acts more cute and girly than herself, and she runs off only to be ambushed by a trio of creepy otaku Manaka had recruited to make Masaki look like a hero. Masaki leads them away from Sumika, but soon finds himself in trouble when they will not leave him alone even after he reveals he is a guy. At the end of the day, Masaki simply tells Manaka not to do something like that again, while Sumika checks her phone to find six voice messages from Ushio.
朱宮の妹、万奈歌は、いつまでたっても純夏にアタックできない兄のため、彼女にデートをするよう直談判する。純夏は流れと万奈歌の策略にのり、つい承諾してしまう。
当日、なぜか女装姿で現れる朱宮。一見すると女同士の不可解なデートが始まるが、実はそのコースはすべて、万奈歌が純夏と朱宮をくっつけるために計画したものだった。女の子向けスポットで兄の可愛さを純夏にアピールしようという魂胆だ。さらに万奈歌は行く先々で待ち伏せて、純夏と朱宮を監視するが、二人はことごとく思惑とちがう方向に行動し、練り上げたプランは一つとして上手くいかない･･･。
Manaka la hermana menor de Masaki se infiltra en la escuela para preguntarle a Sumika porque rechazo a su hermano. Usando unas tácticas bajas logra que Sumika acepte salir con Masaki.
