Xuanhuan: The Protagonists Are All Stumped After the Antagonist Gives Up

After waking up, Xiao He transmigrates into a fantasy world, becoming the incredibly powerful Divine Son of the Ancient Four Directions Sect, and awakens a System. With all the sect's resources at his disposal and a saintess practically delivered to his door, he's set to become a winner in life! Wait, this saintess is the protagonist's fiancée! Heh… looks like I'm destined to be the villain.