Synopsis (Based on Subtitles by FUNimation)Edit
Big Brother Is A Prince! Starts out with a shot of a girl walking through an Ouran flower garden. She starts walking up the central stairs, mumbling about how there might be a monster and Big Brother will defeat it for her, since he is apparently a prince. We find out that the rustling in the garden that scared her was just a large white cat, who runs off. The girl is now walking up the large windowed hallway, apparently to Music Room 3. She enters to get the rose petal spiral, and the Host Club, dressed as policemen, greet her. Tamaki calls her a Kitty Cat, and the girl seems very confused, because there are policemen in there! The policemen turn out to be the Host Club dressed up for yet another act. They ask her where she came from, but instead of answering, she calls them a "Reverse Harem", and though the twins and Tamaki try to say they misheard, she calls it a debauchery and names each role. The twin's reaction at being called "Twincest" is priceless. She then calls Tamaki Big Brother (Gasp!)
She leaped up to hug him, and Tamaki tells the twins at their asking that he doesn't have a little sister, at least not to his knowledge. Tamaki is confused, but Honey-Senpai says that they do look alike, and Kyoya is wondering if his role is on level with Big Brother. Haruhi is angry with her role. Upon asking, the girl reveals her name to be Kirimi. Tamaki asks her if she's make some kind of mistake, and she's sad because he's blond but not her big brother. Tamaki is touched by her sadness, and agrees to be her big brother from now on. This frustrates Haruhi, as she thinks it's an irrisponsible declaration to a young child. Tamaki disagrees, and Haruhi asks Kyoya what they should do. He thinks it's just possible that her older brother really is a blond highschooler, and an unknown blond guy pokes his head out of a doorway, and calls for Kirimi. Honey thinks he's a foreigner, and Haruhi thinks the door looks different, which it does. Two people appear out of the shadows, saying, "Master, you've forgotten your attire", and when they put it on, it is revealed that the blond guy is none other than... Nekozawa!
The two people say that Master is terribly vunerable to bright lights, and that if he doesn't wear black, he'll collapse. Kirimi hates dim places. Haruhi is confused, and askes if this means that Nekozawa is Kirimi's older brother.