Harry Potter: Eclipse. - Chapter 39:

Aomori, who has a monster-fighting system, came to the world of One-Punch Man and gained the ability to enter various instances.

Therefore, “Founder of the Hero Association”, “NO. “And other titles fell on him one after another.

Comprehensive flow, the main world One Punch Man.

Completed dungeons so far: Pokémon – Demon Slayer – Sword – Pokémon – Digimon – Spell Return – Yokai Comprehensive World (Girls that Noragami Inuyasha can see, etc.) – Pokémon – One Piece-re0-Dragon Ball wait.

- Description from novelbuddy

The Yaoguang Realm expelled the foreign demons from the human race, and established the ninth-grade family and sect. At this point, the Yaoguang Realm came to an era ruled by the family and the sect.

The ninth rank rules a city, the eighth rank rules a county, the seventh rank rules a state, the sixth rank rules a country…

Chen Yang came through with He Daozhu, cultivated a powerful bloodline monster, raised the farm, and led the Chen family to become the current saint.

- Description from novelbuddy

Xue Dongting was a singsong girl plucked from her small border town to become the consort of the crown prince. Little did she know she would be murdered by his own hand.

Now reborn, she has a chance for a do-over. This time around, she will marry that fisherman from the next village over and live a quiet, peaceful life, away from the scheming intrigues of the imperial family.

It’s just that, this lowly fisherman is not quite what he seems…

The world was never the same after that day.Humanity learned that they weren't alone in the universe, but that wasn't something they had the time to worry about.Their realization was accompanied by catastrophe.Creatures beyond their wildest imaginations poured down from the sky and appeared from the earth. They slaughtered humans as if it was their singular purpose, driving them to the brink of extinction.The people of the world did everything in their power, developing unique traits and technologies to create a united front their enemies couldn't penetrate.They secured victories and repopulated, feeling as if they stood a chance against the foreign invaders.They fought and they fought, doing everything they possibly could to ensure their survival.Until the Great Calamities appeared.In front of them, humanity was nothing regardless of its efforts.One by one, the worlds were turned into piles of rubble in between the cracks of their teeth. Civilization was torn apart, and the evolved humans living within could do nothing to stop its collapse.Humanity itself was left extinct, and in the end, only a single man was left alive amidst the chaos.Why?For what reason were they punished so?Nobody knew why the attacks began in the first place.He looked into the distance at the memories of the past and firmed his resolve.“It can only be me.”He knew of a miracle that could return him to the place of those memories.He knew of a way to make the wheels of time spin in reverse.And using it, he alone would save humanity from its doomed fate.That was his sacred duty as its final survivor.