Asking again bc I haven't found it

So an anime or manga where the top took the bottom to an aquarium but after they'd closed (so ig the seme/top rented the whole thing after they'd closed or something) and I remember this scene clearly like them standing facing each other and the fish surrounding them

From what I remember the fish were fake it was like simple drawn fish and I'm pretty sure they were hanging from the roof with thread (tbh I'm sure that they were fake) but maybe I'm mixing two stories together so the one I'm looking for might have real fish

I'm pretty sure it was a yaoi manga but it could be anime And if it was anime it was probably a straight couple