G.U.

[Cheifhotrod]

I've seen some pictures where the girls of G.U. dressed in wedding dresses what is that about.

 

[Vesvius]

I think that that's a special event in Redemption (the third volume). You max out a character's affection, then send them a special card. If you send it to a girl (or Endrance), you get to marry them. If it's sent to a guy (or Natsume, who you get in V3), you get a friendship thing.