Ya Xi (轧戏) is adapted from the novel written by Zu Le. Our female lead is described as unlucky in love and plays an immersive murder mystery game where she becomes smitten with one of the NPC (non-player character; they interact with players and supply information to help players advance), who is our male lead. Neither expect a romance to seep into reality. Part of the game is set in the republican era hence the leaked photos and videos of the leads in republican outfits.
You can read the translated novel at Love Eat Tea.