Help pls

I'm trying to find this yaoi I think (could've been bara too) but I only remember one really spesific thing about it so like the uke had a growth spurt and is now bigger than seme and the thing I remeber about the manga is that during seggsy time the seme notices that the uke doesn't put his whole weight on him anymore while being on top bc of the said difference
i know it ain't lot i would be sosososo thankful for help and thanks already beforehand andandandand I don't mind similar mangas either