I feel like I would also find a way to make su'ah bottom for J first. It would be interesting to explore that dynamic and how my versions of them would already have confessed feelings to eachother but J would still be nervous to do more and would mean su'ah offers to bottom first and like the idea never occurred to J he'd stare at su'ah for a sec and then be like "fuck yeah why didn't I think of that!" I'd write it as su'ah loving it because J is happy even though it's not fully his thing. Setting up bottoming as something not just an omega does for the alpha is a really fun way to get J more open to intimacy by showing him look this big ass alpha is so happy rn doing the thing you are terrified to and he's loving it. The fact that he loves it because he loves J and not bottoming would be a fun discovery later on too. I think I would make J a true switch though he'd just get to the point where he's very comfortable with intimacy and the position doesn't matter.
expect more as I get more ideas XD
You know what, I am writing a fanfic.
where su-ah isn't an asshole and is actually the yearning greenflag top I wanted him to be but never was. I would either erase the scenting totally or make it a once off mistake or something he did subconsciously when they were younger and whichever it is I would make su'ah suffer with the guilt tearing him apart but still loving J and desperately trying to stay away but they keep crossing paths. Both of them would have meaningful character arcs. Su-ah coming to terms with what he did and having to learn control and distance, to wait for J to come to him and trust J can look after himself and J looking inward and releasing why not being an aplha messed him up so badly, finally accepting himself and maybe releasing su-ah is not the enemy. Bonus: I can draw so some panels could be nice to have in bits of the fic too.
If I do write it how would I let all the traumatised people here know though, I have a feeling ppl here are not in the fanfic sphere