I say boxers. Though if he went commando every now and then, I would not be surprised. I would also not be surprised if he had a thong sitting in the back of one of his drawers. sorry if that was TMI. orz I saw a picture of it on DA and now the image won't get out of my head.
TB!Seishirou comes to Marina. TRC!Kamui attempts to kill him. How does Subaru feel about this?