Help (╥_╥)

Hi =￣ω￣= So, i can't find this manga that i've used to read. It's about this one guy who is gay and his work is like build a house ? I don't know. He used to fall in love with his boss but now that the boss are married he gave up on him. Every morning his dick are hard and everyone thought that it was normal since they see that every morning. He's targeting those who work with him and still a virgin and ask them to have sex with him and tell them to do it to give them opportunity to get rid of their virginity. Those who agreed must follow these rule. One, those who having sex with him must blindfolded. Two, he musn't make any sound( when he make sound like mouning the other guy will turn off since they are not gay). Three, they musn't have sex twice once is enough. But then there this this guy obsses with him, but he don't like that guy at all, one day when the uke having sex with someone, the seme come intruding and willing to pay the virgin guy to go and continue to have with the uke lol. Argh ! It's hard to explain since i'm not too good with english. Anyone please who understand what i'm talking about and know what manga they're from, please tell me ︶︿︶