Like an actual card game story like Yu-Gi-Oh where people actually use cards from their decks for a game. Bonus if there is an element of realism splashed on the story.
I know how hard it is to make one since I also attempted to make one. Aside from the traditional story parts I also need to deal with creating rules, making decks within those rules, fit those decks to a character then take account of writing games. But here I am testing my luck.