The uke was just dumped by his lover because his lover wanted to marry the company president's daughter and become the president. He gets drunk and has a one-night stand with a stranger, but they meet up after that at a hotel as 'sex-friends'. Before meeting the seme the uke never enjoyed sex before since it always hurt, but ever since he met the seme he couldn't get enough of it. Then the uke falls in love with the seme and he turns out to be his new boss at work. The uke believes now that he knows the seme's identity he'll be rejected so he doesn't go to the usual hotel room where they have sex. Well that's most of what I remember so it would be great if you help me find the name of this manga 🙂

is it Caged Slave?
it's a novel though...

Yep, that's it, thanks