Bartender

Ryuu finally decides to end his apprenticeship at Eden Hall in this final chapter. The episode revolves mostly on the life of a bartender. A few cocktails are featured in the episode, such as the Red Eye, No Name and Rob Roy. "The Macallan 1946" is referred to by Ryuu and his senior bartenders as "The Water of Life", and it is mentioned that its bottle is passed through every generation of bartenders who has completed their time at Eden Hall. The main narrator of the series makes an appearance in this episode and visits Eden Hall and sat down by the counter to have a talk with Ryuu, although the rest of the episode is told from Ryuu and both his senior bartenders' perspective. Ryuu mentions that he feels fortunate to be able to live through his job, choosing not the craft of bartending, rather the life of a bartender. Therefore, the final featured drink is "Bartender".

A professor, who calls himself Okita, specialized in computational fluid dynamics comes to Eden Hall on a Christmas night. He claims to follow a star up until she enters Eden Hall. He later gets into an argument with Ryuu after declining his recommendation of having a champagne, and downing a cup of Guinness beer instead. Afterwards, Ryuu offers Okita the Black Velvet, which is a mixture of both beer and champagne. He doubted Ryuu and boastfully predicts that the drink will spill out of the glass, generally basing off the idea from his years of thorough research and study of fluid mechanics. This is not the case however, as Ryuu successfully pours both the beer and champagne simultaneously, without the mixture pouring out of the cup. It is noted in this episode that Ryuu is amongst the very few bartenders in Japan who are able to mix the Black Velvet perfectly without pouring them separately. Thus, the featured drink of episode 10 is the Black Velvet.

It is raining heavily in Ginza and Miwa is running towards Eden Hall to seek shelter from the storm only to find a "Reserve" sign posted on the front door. Seeing her puzzled look, a nearby street food vendor explains to her that every year on this particular day, the bar is closed for a single customer, the customer who Ryuu served a mistaken cocktail. Sensing Miwa's doubt that Ryuu could ever make a mistake in fixing a drink, the vendor proceeds to tell the story of Ryuu's early days as an apprentice bartender at Bar Saito through an extended flashback. An important looking businessman named Ryuuichi Minegishi arrives at Bar Saito with an attractive, younger date, Kanako. Minegishi seems to know the bar's master, Ryuu's senior bartender, quite well and gives Ryuu his business card which indicates that he is a CEO of his own company. Kanako orders a champagne cocktail and Ryuu serves her Champagne Pick-Me-Up in a tall flute glass.