You can unlock all the in-game David's Costume using this DLC.

*All of the above documents can be normally obtained in-game.
*This purchase will be installed into the base game upon download.
*This purchase is not included in the Deluxe version.

• D4: Special Costume Set -12 Beers-
  
• D4: SWERY's Choice Costume Set -4 Cups of Coffee-
  
• D4: SWERY's Choice Costume aSet -4 Bottles of Tequila-