I've seen 2 student and TA relationships IRL. They're all adults but one of them has a noticeable age gap and that one seemed to have a pretty strong and healthy relationship, the other didn't last long though. I'd say as long as they're both adults and they can both communicate well in the relationship, it may work.
90% of popular yaoi manhwas aren't worth reading
Horse face is a peice of shit wbk https://discord.com/invite/2nQTa8pCWv
Hijikata from Gintama was my first. I actually discovered Yaoi by accident when I was looking for sexy Hijikata wallpaper. After that, I started buying manga and a library full of doujinshi from Japan with all kinds of hotties, not just Hijikata. I also started learning Japanese so I could actually read the manga and doujinshi I cherish. Hijikata......
Do teacher x student really happen? Do they work?