Dry shake all ingredients but the cream until foamy. Add cream and ice and shake. Strain into a fizz glass (no ice) and top with the freshest soda water you have. Allow to settle, and then slowly add more soda to create a cloud of foam above the rim of the glass. No straws, no garnish. Bask and enjoy.
Midori is intensely flavored enough that the drink can survive serving in a larger glass (like a Collins) with more soda.