"Katawa Shoujo is a bishoujo-style visual novel set in the fictional Yamaku High School for disabled children, located somewhere in modern Japan. Hisao Nakai, a normal boy living a normal life, has his life turned upside down when a congenital heart defect forces him to move to a new school after a long hospitalization. Despite his difficulties, Hisao is able to find friends—and perhaps love, if he plays his cards right. There are five main paths corresponding to the 5 main female characters, each path following the storyline pertaining to that character."
(http://katawa-shoujo.com/about.php)
"Despite the premise, though, the entire subject is handled very tastefully ([片輪] "katawa" is actually a Japanese euphemism meaning "imperfect" or literally, "one wheel"), and the characters manage to break free not only from any stereotypes associated with their disabilities, but also from many of the typical Dating Sim cliches, resulting in a surprisingly well-written tale." (http://tvtropes.org/pmwiki/pmwiki.php/Main/KatawaShoujo)
Get the game at http://katawa-shoujo.com/download.php Enjoy!