Originally an eroge visual novel by Caramel-Box, Otome wa Boku ni Koishiteru (oficially released in english as "Otoboku: Maidens are Falling for Me") tells the story of Miyanokouji Mizuho who finds himself forced to attend an all-girls school because of his grandfather's late wish (don't ask why, it's a porn game). So Mizuho is forced to attend the school while pretending that he's a girl.
The game was originally released in 2005 for the PC. It later gained PS2 and PSP ports without h-scenes (and even some parts of the script modified to make it seems like there wasn't any kind of sexual contact in the first place). The PC version was released in english by MangaGamer just yesterday. A sequel, Otome wa Boku ni Koishiteru 2: Futari no Elder was released a year later. It features the same setting but with different characters. Otoboku 2 is also a sequel of some sorts, since the main character of Otoboku 2 (also a trap) is Mizuho's cousion.
There's a 12-episode anime series that follows Itsukushima Takako's route (somewhat) with a 13rd special OVA that is a parody of Cinderella (in which the character Takako is known as Tsunderella). Otoboku 2 also has three animated OVA. Both series have quite a few light names, audio CDs and also manga.
Opening and endings
I'm currently playing the newly released VN. Trying to get into Takako's route for Tsundere deliciousness. Couldn't find a topic for this via the search function, so I created a thread.