Grab 2 cocktail glasses, then mash, mascerate, or mince your strawberries until they release their juices, and put equal amounts in each glass.
Measure out 2oz. of strawberry soju (¼ cup or two shots) into each glass, and stir the berries and soju together.
Measure out half the 2.7oz. container of Yakult into each glass, and stir everything together well (from here on out it will separated every once in awhile, but just give it a nice stir before you sip).
Either measure or just pour your soda to the top of the glass (leave room in you want to add ice), then lightly stir everything together (just don’t shake it or the soda will lose its fizz).