If you are the owner of Cooking Simulator, you will get the 15% loyalty discount when buying Drug Dealer Simulator, which releases on April 16th. The discount option will be displayed on the game's store page. Both loyalty and launch discounts merge in one, so you can grab the game with at least 25% off :)
Loyalty discount will last 7 days after the release. It’ll be available after logging in your Steam account owning Cooking Simulator.
More info about the game:
https://store.steampowered.com/app/682990/Drug_Dealer_Simulator
Release Date Trailer:
https://www.youtube.com/watch?v=WHELXnfzcTw
New Official Commentary Guidebook:
https://www.youtube.com/watch?v=m0ygfVSJPAk