There was a game I played a while back... First sex game I ever played. It was Japanese or Hentai I guess you would call it. It centered around a boy who had like three girls at his school he could get to like him. He had a girl from the future appear and try to shoot him with a gun, you could go to a fighting club, and your teacher I believe is one of the best fighters. You can meet a girl in a pool at school, there is a drama club, I think,and something about trying to have the girls as models. I think the girl from the future even gets put in your basement and believes she is a cat.

Anyone know the title?

Sounds like Sim Girls - never finished it but sounds about right...

The game you are looking for is Simgirls.

Here is the creator's site with more information about it:

http://blackspears.com/simgirls.html