Poker Face

I want to re-read this yaoi manga, but I can't find the title. here the story : the uke is a salesman who looking for Sake, and there is some sake shop which is really really famous because of the taste, but the owner is so stubborn and he don't want to sell his sake to that uke, and the uke visit the owner everyday, and then he meet the owner grandson, later will be the seme. the seme looks really cool, and have a part time job as IT (maybe, related to computer). and the seme work for the uke company, and and and and the love is blooming.

Any clue?
Thank you for your help, and sorry for broken English

I read this manga a years ago, before I made an account in here. soI cant marked it. the plot is about a uke *actually seme* who working at i dont know if it's a gay bar, or something like prostitution office. the seme met the uke in there, actuallly that's the first time the seme come to place like that, and then the uke seducing the seme, and they have sex, actually the uke who actually a seme's want to teach the seme about sex between guys, but it ended with he is being the uke for him. I'm sorry, I kinda forget about the story.
I hope there's somebody who know about that kind of story.
thanks a bunch. arigatou :3