My Wife is a Dead Villainess, and I'm Her Living Weapon - Chapter 27: Birth

The starry sky was resplendent, filled with tens of thousands of Tribes!

During the Great War of the Immortal World, when the race of the God Realm was annihilated by the sixteen Immortals’ Alliance, one of their clansmen accidentally fell into a Purgatory of three thousand years under the Immortal World, lucky enough to survive …

A few years later, in a mysterious hidden family in the Purgatory World, a crippled youth who had been abandoned by his family had accidentally awakened a dragon vein …

- Description from novelupdates

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.

God rewards hard work, and there must be rewards for paying.

And no matter how hard you work, you will gain 100%!

So, for things like cultivating immortals, don’t you just need to have hands?

- Description from novelbuddy