Sister Princess

is a Japanese video game series released on the PlayStation in 2001.

Synopsis
Wataru Minakami is a top student who failed his high school entrance exam because of a computer glitch. He later discovered that he was accepted to Stargazer Hill Academy, which is located at a mysterious place called Promised Island. At the request of his father, Wataru is whisked away to the island, and before he can settle in, a dozen of cute and charming girls start to flock him and claim to be his younger sisters. As Wataru gets closer to his newfound siblings, a deeper mystery as to why they were sent to the island comes to play.

Games

 * Sister Princess: March 2001 [PlayStation, DreamCast]
 * Sister Princess ~Pure Stories~: December 2001 [PlayStation, DreamCast]
 * Sister Princess 2: March 2003 [PlayStation]
 * Sister Princess RePure: March 2003 [GameBoy Advance]

Sister Princess RePure
A Light Novel written by Sakurako Kimino, with illustrations by Naoto Tenhiro, based on the anime series: Sister Princess RePure released in November 2002.

Sister Princess
An anime series based on the game series, Sister Princess, aired for 26 episodes between April 4, 2001 and September 26, 2001.

Sister Princess RePure
A 13-episode anime series released between October 2, 2002 and December 25, 2002.