User blog comment:Gundam Legilis/DDI In Depth - The plot/@comment-25405817-20140913232842/@comment-4010415-20140915063421

Sure, it was quick, but it didn't feel that odd to me.

Jaune still had feelings for Weiss, so he wasn't gonna stand for Neptune rejecting her, especially when Neptune was joking around and having fun with Blake and Sun while Weiss was standing alone off to the side fidgeting with a dead flower. Weiss was clearly having a bit of a hard time while Neptune was having fun.

However... on the way to chew Neptune out, Jaune saw Pyrrha sadly leaving the dance. He learned in volume 1 that his team comes first. His teammate was sad, and he hadn't seen her around the dance much at all, so Neptune could wait. He went up there to talk to her and see if she was okay. He didn't know until she confessed to him that she likes him and wanted to go to the dance with him, and he finally realized that she was completely serious when she had said that there weren't guys asking her to the dance.

She leaves, Neptune shows up. Well, now Jaune got to chew out Neptune and found out that Neptune wasn't being some player jerk. I guess Neptune figured, why not take this dude's advice? All that was left was the fact that Jaune needed to make it up to Pyrrha, cheer her up, and dance with her.

It wasn't just some sudden 180 out of nowhere, at least.