Responses

dont know if it counts - they do not hide it, but they are also no boosting about it at the beginning, and ukes got surprised with the fact..
http://www.mangago.zone/read-manga/neko_chan/
http://www.mangago.zone/read-manga/katekyo/

and here vol3 - the one with lots of surprises is more uke but they are reversible couple :D
its really funny
http://www.mangago.zone/read-manga/karamete_de_kudoite/
any yaoi where the seme was rich but kept it a secret from the uke?