MTL - I Really Don’t Know How To Practice - Chapter 899 clearly stated

In the ancient centuries of the yonder past, the heavens and the earth was rent, and in Long Ji Continent a tribe of dragons ruled supreme. But now, the dragons are extinct, and with a mysterious catastrophe descending, the fate of the world is at stake!

A teenager named Long Chen takes on the legacy of his father, chases after the mystery behind the sudden extinction of the dragons. In a lucky coincidence, he becomes the first ancient dragon warrior in an eon, with the responsibility to uphold the dragon tribe’s honor and the command of all dragons under heaven.

With the most passionate battles, heart-moving tender scenes, brutal slaughters, and filled with the majesty of dragons. On the advent of the catastrophe, millions upon millions of dragons descend upon the world again, bringing the world to the brink of an era of war.

For he of the ancient dragon tribe, is willing to paint the sky with blood, if only for the bonds of brotherhood; with a wave of the hand to reverse the flow of the galaxy, for a goddess worthy of praise; will pull the gods down from their celestial pedestal, sunder the heavens, for the good of all living things under the sky!

- Description from Novelupdates

Arthur is an Atelier who works under pressure. When the curse of the Succubus activates his Netori System, Arthur is unable to resist his desire to win a woman's loyalty. There is no other reason for him to test a woman's loyalty that is easily shaken when his Netori System is activated.

The little handsome son-in-law passed through a world as waste material and the husband of a wealthy family. But because of his lacking aptitude, the wealthy family had driven him out. So he worked hard and found a more powerful family’s thighs to hold onto. Soon enough, he became the strongest son-in-law and husband in history.

In this world, it was impossible to practice martial arts. It was futile so he might as well take advantage of his wife’s thighs and maintain a comfortable and leisure lifestyle.

He’ll train his wife to become the strongest and best person in the world.

“Whoever dares to provoke me, let my wife kill you!”

- Description from Novelupdates

Young and skilled warrior Jincheon finds himself at the heart of chaos when his hometown is suddenly attacked. Amid brutal and deadly battles, he faces an impossible choice – life or death.Surrounded by the flashing, glowing swords of his bodyguards and the shadows of the attackers, Jincheon desperately searches for an escape, only to realize that in this world, there are no easy answers. As he tries to flee through the kitchen of a small, strange, and unusually dark inn, he discovers an even greater danger: the exit is hidden, and the only way out is through a dirty, old drain.But his path is not so simple. Along the way, he encounters a mysterious man whose intentions remain unclear, but who seems to know exactly how to help Jincheon. With time running out and death looming ever closer, Jincheon must decide whether to trust this stranger or face even greater dangers alone.How far is he willing to go to survive? And who will turn out to be an ally, and who an enemy, when every step is a battle between life and death?