Probably not but sounds similar to this?? http://www.mangago.me/read-manga/love_stage/
It can also be this, lolol guess he must like watersport huh.
http://www.mangago.me/read-manga/akuma_chan_wa_momoiro/
Wow ch. 4 Σ(っ°Д °;)っ
( ° ʖ °)
Thank you so much!!! Also you are not wrong tho
Not this one but thank you so much
The seme never felt anything except that moment when he met the uke during his childhood and the uke pissed in his pants and he got embarrassed then the seme thought it was cute and they have always been together since then