There was a show on Cartoon Network roughly around 2004 I think and it had 4 characters (3 boys and 1 girl). The overall show seemed anime and the setting was a boarding school I believe. These 4 kids would all meet in a warehouse on the property of this school and they would go to the basement where they had some computers and pods and stuff and 3 of them would go in and they would be converted into game players. The other kid (who 'designed' the software) would stay outside and monitor the other kids. He was in love with the girl in the game with pink hair. The whole idea of the show was that the one kid who made or found the game figured it out and now he feels that he should protect and save this little virtual world. Can anyone help me with the name of this show?