Otome wa Boku ni Koishiteru

Otome wa Boku ni Koishiteru (処女はお姉さまに恋してる), commonly known as Otoboku (おとボク), is a Japanese adult visual novel developed by Caramel Box and released on January 28, 2005 playable on Windows PCs. The game was later rebooted into non-eroge versions into the PlayStation 2 and PlayStation Portable. The Windows version was released in English by MangaGamer in 2012.

The franchise was popularized into several media publications from manga to comic anthologies, light novels, art books, audio dramas and several music albums. Caramel Box later produced a sequel entitled Otome wa Boku ni Koishiteru: Futari no Elder that was released on June 30, 2010 for Windows PCs.

A 12-episode Japanese anime produced by Feel aired between October and December 2006, and an OVA episode was released in April 2007. Media Blasters licensed the anime and released the series in three DVD volumes. A three-episode OVA adaptation of Futari no Elder produced by Silver Link was released between August and October 2012.

Plot
Mizuho Miyanokouji couldn't believe his ears when hearing out his grandfather's will. To attend the private all-girls school named Seio Girls' Academy as Mizuho's mother did. With the help of his childhood friend however, he gets a makeover good enough to fool everyone at the academy.