Ryu Sasakura won the title of "Glass of the Gods" while travelling across europe as a bartender. After 8 years of absence, he comes back in Ginza, Japan, to work in a small bar, the "Lapin", were he use his ways with liquors to sooth the pains and help his customers, regular ones and occasional ones.

It's a very original manga, of the kind that sucks you in despise it's absence of action. You'll come to learn some true stories revolving around alcohols and cocktails, and you'll even learn how to make them in the process.
It exist an anime version of this, in 11 episodes, but it's rather puzzling in the way it's constructed.