Blue lust?
http://www.mangago.zone/read-manga/doutei_hitsuji_to_abazure_ookami/. I believe it's in here.
Sorry. It's actually this one. http://www.mangago.zone/read-manga/terebi_kun_no_kimochi/
A thank you very much, but unfortunatly that's all not it... It was more like...they already did have sex. The seme was unexperienced though and every time the uke said stop, he would stop, not knowing the uke is actually feeling and trying to hide it. I think, it was an advice of a friend of the seme, that made them face the trauma...
But I still read and enjoyed all of these Manga ^^ thx
So in the manga I am searching for the uke was afraid to go all out during sex, because of a trauma he got due to his previous relationship. His partner in the past thought of it as disgusting how he enjoyed sex and the uke heard how he told his friends about it, since then he doesn't want anyone to find out. His partner now gets him to overcome his fear eventually.
I really liked it, but forgot the name.
I appreciate every kind of help! Thank you in advance <3