After the Disabled God of War Became My Concubine - Chapter 4.1

He was only an ordinary Chinese youth. Because of the strong refusal of his soul, he unexpectedly arrived in this strange world. He ardently loved peace; yet, he had no choice but to become a Demon God. If cultivating to the peak could lose person’s human nature, then all living creatures will weep with grief, waiting to be slaughtered. Can he still remain calm after this? In the vast wilderness, a handsome youth carrying the wisdom of “Daodejing”, step by step would rise to prominence in this world. Condensing and cultivating his bloodline to the supreme. Controlling and commanding the rivers. Swallowing and spitting the sun…

Tl: 1.Daodejing also mean as “The classic of the virtue of the tao” was a book of dao by Lao tzu, a sacred text of Daoism.

- Description from Novelupdates

Kim Hyun Woo lived the life of the wealthy thanks to his parents. But one day, he received a phone call informing him of a traffic accident which involved his parents. His father had died and his mother was hospitalized in critical condition. The normal life he once knew, collapsed…

They sold their house, cancelled various insurance plans, and moved to a one room apartment. And after a few years, Hyun Woo spends four to six hours tending to his mother and worked to pay for her medical bills.

One day, one of his Instructors recommended him for position in a company called Global Exos, who made an announcement of making history with the newest technological invention.

In the era of universal mechas, people can go to the endless abyss, collect materials, strengthen and forge their own mechas, and master the power of destroying the world.

Jiang Chen traveled through time and awakened his talent [Immortal Unarmed]. Once the mecha is broken, he can permanently absorb its power and receive multiple bonuses.

…

At the bottom of the abyss, when the Old Demon God finally broke the Titan mecha with great effort, a hand stretched out from the fragments and held down its head.

“Congratulations, you have unlocked my limiter.”

- Description from novelbuddy

There are a total of seven sins, and a revelation is made to a young man named Alex that he is destined to become a demon lord, more especially a demon lord of sin called LUST.

It's not like he can change that and because he always knew something about himself was different—not in a physical sense, well, maybe a little—and not in a mental sense—but rather because he is thrown into a demonic war that compels him to accept his new reality.

He was only aware of a difference in himself. Relating to him and the ladies who are drawn to him... Well, it was more or less like he was a magnet in front of all the girls, and all the girls were drawn to him like a metal.