Mint na Bokura

A manga by Wataru Yoshizumi (of Marmalade Boy and Ultra Maniac fame), wich ran between 1997 and 2000.

Fraternal twins Noel and Maria Minamino had always been extremely close, so, when Noel comes back from Spring vacations to discover that during his absence Maria has transferred to a boarding school pursuing a guy she fell in love with, without even telling him, he doesn't takes it well. Decided to get his sister back for all means possible, he decides to enroll in the same school as well. The mere detail that the only free lodging is in the female dormitories doesn't deter him; after all, with a wig and a padded bra he can pass as his twin's sister. Rounding the cast are are Ryuuji Sasa, a guy whith a fame of not getting along with girls who befriends Noel, and Miyu Makimura, Noel's roommate and eventual love interest, which has an aversion of liars (and giving the pretenses under which Noel is staying in the school...)


 * Big Brother Instinct: Noel, all the way.
 * Hormone-Addled Teenager: Maria is a toned down version of this
 * Ho Yay Most of the relationship between Sasa and Noel
 * Serial Romeo: Maria, in a lesser way.
 * Sweet on Polly Oliver: Sasa develops a crush in Noel, not knowing the latters actual gender.
 * Twelfth Night Adventure
 * Wholesome Crossdresser: Noel.