Nothing at all

Naruto didn’t make a move due to the fact that seeing Karin’s ass made Naruto do something rather embarrassing. Naruto had rather limited experience with women so seeing an ass as amazing and perfect as Karin’s was a too much for him. This caused him to cum in his boxers leading to a large wet spot to appear on them. Naruto hoped that Karin didn’t notice this or else he would be mortified.

After a couple minutes of Naruto just standing there Karin looked back with an annoyed expression on her face, “What the hell are you… Oh!” Karin stopped as she seen the rather large wet spot on Naruto’s boxers.