My Space-Time System - Chapter 520 - Red flag.

A rookie clerk asked his senior curiously: I heard our President is already married?

Shirou only had the best intentions that night he chose to cast aside his ideals. Now trapped in a strange world where Gods, Angels & Devils run rampant, he's about to learn just what kind of road said intentions have built...provided he can finish his second year without accidentally kick-starting another Holy War.Translate and writing awesome fanfics..

When an era came to an end, various forces set foot in cultivation to compete for immortality. A young boy who spent most of the time sleeping got lucky in the troubled times and became an unparalleled immortal who could cover the sky with a snap of fingers. Was he going to live forever?

- Description from Novelupdates

After Xia Feng transmigrated, his heart was mysteriously removed.In its place, a defective demon heart capable of sustaining life only for eighteen years was implanted.This is a magical heart that can sync with the power level of its target.To stay alive, he bound himself to the ultimate villain of the future, a Destructive Witch who was destined to destroy the world.The stronger the Destructive Witch becomes, the stronger he becomes!Thus, Xia Feng realized, it's not my fault for stirring up trouble: “Miss Witch, I admit you're strong, but not strong enough!”