"Hey, you made good time." Marui is ready when Tezuka gets back, and it's very clear that this dude REALLY wants another slushie, (but really, who can blame him.) He takes the cup from Tezuka, mixing the goods with some hot water to release the flavour before cooling the mixture with a few ice cubes. Then it was business as usual, adding the matcha to the ice, along with the tiniest bit of clear syrup.

The resulting drink is much more subtle and true to the matcha flavour than the last one, as Marui didn't have to add a bunch of extras to cover up the algal after taste. He passes the drink to Tezuka-- enjoy, my dude.