I Became Invincible by Cultivating the Rapid Dao

What would someone who gains a System and transmigrates into the world of a novel do? Besides becoming invincible, he'd also get his hands on the women the upright, honorable protagonist wouldn't dare touch, and tweak the protagonist's fate while he was at it. Otherwise, what would be the point of coming here?

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.