In this manga, there won't be that stupidity about models not being allowed to date, right? Basically, a cosplayer is a model, I know she already works as a model, but the fame will be because of the cosplayer..
She is in no idol agency so I think there won‘t be BUT the author did push 50 panels of grown men obsessing over and falling for her. Possible that there will be online issues with her being publicly outed and Gojou being caught crossfire.
Thing is, these last 3 chapters fully confirmed that both just want to do this for fun and most importantly together (even if she was all ready to just throw it away and the worst partner possible).
Any possibly incoming drama is already 0% impact and fully defused.
They both are on one page also and I think force changing Marin without writing one more time and borderline unrecoverable ruining her once more is a bad plan.
This all also makes a "no dating rule“ or her denying a relationship with Gojou pretty much impossible.