First, grab a glass and pop it in the freezer for a few minutes to get nice and cold. While you wait, gather all your ingredients and tools.
Take your cocktail shaker and fill it halfway with fresh ice cubes. Pour in 2 ounces of Midori, 1 ounce of vodka (skip this if you want it lighter), 1 ounce of fresh lemon juice, and half an ounce of simple syrup.
Put the lid on your shaker and shake it well for about 15 seconds - you'll know it's ready when the outside of the shaker feels frosty cold.
Take your chilled glass out of the freezer and put some fresh ice in it. Strain your shaken mixture over the ice.
Now comes the fizzy part! Slowly pour in 2 ounces of club soda or lemon-lime soda. Give it a gentle stir - just enough to mix everything together.
For the final touch, stick a cherry and an orange slice on a cocktail pick and place it on top of your drink. That's it - your Midori Sour is ready to enjoy!