seizaa's Favorite

It's about a college student (uke) who goes around drinking beer from one place to another. Then he suddenly stumbles upon a bar, then the bartender (seme) gives the uke a cocktail. The uke becomes addicted to the cocktail that he spends all his allowance on the cocktail at the same bar. The uke's friends invite the uke to a mixer party, he orders a cocktail but then realizes that it's not as good as the seme's cock. so the uke goes back to the bartender, and the bartender tells the uke that he can have as many cock as he want in exchange for his body, or something like that.
Help is much appreciated. Please and thank you

Does anybody remember the yaoi manga about an uke who found the seme unconscious and naked on the ground at his (the uke's) temple and he tried to give him water mouth to mouth then the seme woke up with an erection? The uke was also being bullied by some other kids to give them his money and he didn't have it, then later the seme beats the guys up for the uke. I only remember it was part of a side story after the main story.

Thanks in advance