Oh wow– Um, I would have to say Ochako would kiss Izuku first. I feel like Izuku would be a tad bit oblivious in regards to showing affection. I mean, I’m pretty sure he’s aware of it, but he probably doesn’t know how to initiate it himself? Whereas Ochako is more inclined to showing affection and getting her feelings across, I believe. Of course, both her and Izuku are pretty much a bit hesitant on stuff like kissing and whatnot since they’re so easily flustered. So if anything, I think it would take a bit of time for them to do stuff like that? But yeah, I’m pretty sure Ochako would be the one that musters the extra ounce of courage to give him a little peck– in comparison to Izuku who probably overthinks about making a move on her which ultimately gets him to opt out last minute due to nervousness. What dorks..