Responses
http://www.mangago.me/read-manga/iyayoiyayo_mo_kiss_no_uchi/
I'm not sure if this is what you're looking for.
Uke turned out to be ''sensitive to touch'' due to seme sneakily give a kiss mark on him.
I can’t remember the name but what I do know is that the uke genetic disorder he gets aroused whenever people touch his bare skin. I think I saw exact description on the wrong manga and I can’t find it anywhere. Ring any bells for someone?