Question about this game

I just saw this game for the PS2 in a store and the box says that it has online features. Do I need to be online to play this game or is that just a bonus feature?

There is an offline and an online mode. It is really intended to be played online. The offline mode is more of a bonus feature. Offline is a complete game itself, but everything I've heard says that it is very lacking compared to most other games and the online mode.

IT IS! You get your own room that you can decorate with stuff, but thats it. In the online mode you get to change the entire setup, Size, color, lighting, objects, windows, shape......It is a fun enough story though, its a little too predictable, but its fun.