There is one with high schoolers like that and the uke is upset when he can't play a cute princess type in their school play or something.
One of Sakira's anthologies
no unfortunately it's not them but thank you alot
I remember it was a long story development not a one chapter thing
Thank you but this is not the one
Maybe this one http://www.mangago.zone/read-manga/soba_ni_oitene/
This is actually a nice one but sadly this is not it I think I'm gonna give up on it.
You can look for your manga in this list
http://www.mangago.zone/home/mangalist/45879/?filter=&page=1
kawai akuma
I'm looking for a yaoi where the seme is older than the uke and seme is well built than the uke as in larger than him but as time goes by the uke gets older and body changes to become larger than seme .there is this particular yaoi where this happens but I can't remember the name. Anyone know it?