NEKOPARA Vol. 0 was released on Steam with trading card support on 17 August 2015. There are 8 cards in the series, and you'll receive 4 cards at random for purchasing and playing the game.
The other installments in the game series, NEKOPARA Vol. 1, NEKOPARA Vol. 2, NEKOPARA Vol. 3, NEKOPARA Vol. 4 and NEKOPARA Extra also have trading card support.
Chocola & Vanilla
Chocola & Vanilla 3
Chocola & Vanilla 4
Chocola & Vanilla 2