My Xianxia Game Girlfriend Seems a Little Off

After another grueling day at his 996 job, Lin Yue opens the browser game "Sword Immortal Rat Race" and starts grinding monsters with a female character. His moves are ferocious: he parries point-blank and instantly kills a Holy Maiden of the Demonic Cult, then follows up with an execution that cleaves a Golden Core demon beast in two. Fighting monsters above his level is as easy as drinking water. The whole sect is stunned: this girl is a once-in-a-millennium sword genius! Only Jiang Yuebai is on the verge of tears: Help! There's a demon living in my head! I didn't kill anyone! Lin Yue: This browser game's AI is really good. It even knows how to cry for help. Then one day, his controls lag for half a second. Jiang Yuebai, who had been panicking just a moment before, suddenly turns ice-cold and kills her opponent with one sword strike. “Sorry, I lagged.” Only then does Lin Yue realize: in the “single-player game” he's been playing for hundreds of hours, every NPC... is alive.