Sister Princess

Sister Princess began as a series of light novels that ran 54 issues from 1999 to 2003. During this time it was made into a 2001 video game, along with a 13-episode TV anime series that same year which ran 26 episodes from April to October. A manga adaptation also ran June 2001 to July 2002.

A second game was made in 2002 along with a second 13-episode TV series subtitled "Re Pure", a title shared by the third game in 2003.

Plot
A guy meets his twelve sisters on an island.