>>5 There is only 1 season. If your talking about "Shuffle! Memories" thats a 12 episode OVA but some call it a season 2. I dont think you should watch it because its all recap except for the last episode. If you end up to like any of the girls from watching season 1 look up on Wiki which episodes of them you want to watch (there are 2 recap episodes for each girl).
One more thing........... Sia FTW!!! XD