My Maid Sisters Have Cat Ears (妹は、規律正しく美しく！Imōto wa, Kiritsu Tadashiku Utsukushiku!) is the 6th episode of the Kono Naka ni Hitori, Imouto ga Iru! anime series.
Due to her shop failing, Mei is told by her adoptive father to come back to Massachusetts. In response to this, Shogo tells Mei he is willing to get her shop back on track, with the help from all of his friends. After a successful advertising made by Shogo, Mei's shop earns much more and is now able to stand on its own. Mei tried to seduce Shogo later that night, but Shogo gets an interrupted phone call from Ikusu, who discovers that Mei might be the girl that calls Shogo every morning. Shogo confronts Mei because of this, and she admits that she was distracting him from knowing his real little sister to prevent any torment by his family and scandals from his company. However, Shogo firmly declares that he will do anything in his power to protect his little sister. In exchange, Mei promises him to introduce him to her if he is able enough to do so, as Shogo asks Mei for her to take care of his little sister.