What Does the Male Lead's Love Triangle Have to Do with Me, the Villain?

Chen Lang woke up to find himself in an unfamiliar king-size bed. And that wasn't all: a beautiful woman was lying beside him. After a few seconds of stunned silence, memories flooded his mind. “What the heck?” “Did I transmigrate into a book??” “I'm in the world of The Urban Dragon King, and I stole the male lead's woman???” Thanks for asking. I'm suddenly feeling like a dead man~