1 360 ml bottle of soju I use Soju fresh you can use whichever Soju you like including the flavored like apple or Peach and 1-liter bottle of pineapple juice

Take a sealed Soju bottle. Swirl bottle so the Soju inside tornados repeat for 10 seconds

Open Soju and add directly to Pineapple juice you can add both together the full amount I usually half a pint glass of Soju and then fill up the rest of the pint glass with that pineapple juice