(The main story has a one-sided crush; ship whoever you like.)
Otherworldly Heavenly Dao: Here's the thing. My world is falling apart, and even the chosen one can't turn things around. I need a little outside help to get things moving again, say, a world thrown into chaos.
Mu Chenlin, who's gotten carried away playing games: How chaotic do you want it?
Otherworldly Heavenly Dao: For a hundred years.
Mu Chenlin throws his head back and laughs: I'm going to be the worst villain in history! Heh heh heh!
And so he transmigrated with more than a dozen of his game characters...
Then things went horribly wrong...
After eight peaceful years in the modern world, Mu Chenlin is back to flipping tables: (╯‵□′)╯︵┻━┻
Mu Chenlin: I'm going to make a comeback! I'm going to plunge the world into chaos!
Back in the other world, Mu Chenlin clutches his weak little swordsman character and weeps. He's broke, powerless, and stuck cleaning up the mess he left behind.
Good grief! The secret identities he'd killed off have been reincarnated! What on earth do they want?
Mu Chenlin: Hey, you! Get over here!