Seifer didn't let go. He did reach for Hayner's other hand though, just in case he did try to punch him.
"Why? You have classes tomorrow." It was really starting to piss him off that Hayner was trying to avoid telling him what was going on. "What's going on Hayner?" He certainly wasn't going to let Hayner just walk out of this room, and possibly his life, without some sort of explanation.