Premieres April 2024. I can confirm that a Gin Fizz is a great drink. Just remember to drink responsibly according to your local laws and regulations. Synopsis from AniList:

Genius bartender, Sasakura Ryuu makes the most incredible cocktails anyone has ever tasted. Seeking his “Glass of God”, individuals from all different walks of life visit his bar. With both a compassionate ear and a godly drink, Ryuu helps people with their problems.

Edit: In case you have trouble reading the recipe, I have transcribed it below:

Ingredients:

  • Dry Gin - 45 mL
  • Lemon Juice - 20 mL
  • Sugar - 2 tsp.
  • Soda water to taste

Directions:

  1. Shake all ingredients except soda and pour into tumbler.
  2. Add ice, fill with soda, and lightly stir.