[Hentai][Manga] looking for a hentai, please help if you can

I'm looking for this one hentai. It starts off with some co-workers at a bar getting a drink and one of the workers (the guy) says that he can get any girl that he wants easily if he tried. The female co-worker declines and says something like oh your full of yourself/ to conceited. The male co-worker then says he can easily get her (female co-worker) in bed if he wanted to. The female gets mad and says something like he wayyyy to full of himself and then I guess they made a bet or something so later that night they went to a hotel. Next thing you know he started begging for sex like a little boy then she lets him not know it was all apart of his plan.