A Dead Diehard
Member
Ryuji was a bit of a perv at times, though Ann seemed to take it mostly in stride. Then again, he only seemed to perv on her, but that could just be because she was really the only one he interacted with regularly.
But it didn't seem to go "too far" in my opinion, now was it super cringe. I think that's because the way he was presented, you knew it was never going to go beyond a leer, at least not without her permission.
He does kind of leer at Haru when she gets introduced at Shujin. Not much, but can be considered.
Also him hearing about Hifumi gets him keen iirc.