Games of Hearts and Diamonds; Chishiya x fem reader

You, a writer visiting Tokyo was plunged to the Borderlands together with the others. After the destruction of the Beach you need to extend your visa, and are now nervously waiting for your next game to begin.

"I noticed a familiar silhouette leaning against the wall across the room. A short figure, whisks of ash colored hair sticking out from under the big hood hiding his face, but ironically making him easier to recognize. I sighed as memories from happier times at the Beach flashed through my mind, but was swiftly brought back to the present as the big overhead TV screen came to life, announcing the beginning of the game."
"Difficulty; Jack of hearts."

The story starts at the Jack of Hearts game in season 2, and follows the series until the group is back in the real world. I mostly follow canon, but two games are rewritten so we can take part in them (Jack of Diamonds and King of Hearts).
It's written in 1st person, with a nameless female character, with a backstory and some physical traits described. There will be canon-typical violence, some gore, and eventually, sex.
Main focus is on the growing relationship between reader and Chishiya.

Hope you'll enjoy the ride.