I don’t personally recall a single instance of him acting perverted, so why does she constantly act like he’s trying to crawl under the skirt of every girl he sets eyes upon?
The pheromone ring was understandable as a misunderstanding due to its nature, and some of the class definitely abused their powers in that way where they allowed, but he saved them and has just been interested in levelling up, but she reacts like he alone is a sexual predator that should be on a watchlist somewhere.
Perhaps it’s just meant to be cute/funny jealousy on her part? But it comes across as weird in context