Inside the Cave of Obscenity - Vol 1 Chapter 4: Adventurer 3

Vampire Slave Number 43, or the self-named, Azriel Ruinous, learned about the history between the humans and the Vampires and it filled him with rage and hatred.

Nonetheless, he was helpless to do anything.

After years and years of suppression, the Vampires have become the weakest race in the world.

However, lady luck seemed to be on his side as Azriel found an ancient jar filled with mysterious blood that will not only change his, but his race's destiny as well.

This, will be the story about the rise of the self-named, Azriel Ruinous, and the Return of the Forgotten Blood Empire.

...

“Have you heard about the rumour?”

“What rumour?”

“They say that there's a Vampire on the loose, he's out there killing humans mercilessly”

“Hahahaha! That's the funniest joke I ever heard! Vampires? Those Slaves? Hahaha!”

“Yeah, I feel the same! I think someone just started this rumour as a joke! Hahaha! How can those weaklings kill us, humans?”

“True True…”

In a bar, two middle-aged men talked and laughed as they discussed the recent rumour they heard.

Seeing those two, a drunk old man shook his head as he sighed.

“Ignorance is bliss indeed…”

“These younglings do not know what the real fear is…

The vampires may have fallen… but my old bones still remember the days when they were in their prime…”

The old man sobered up in an instant and his body shuddered in fear as the memories of the long-forgotten horror appeared in his mind.

He then took a deep breath as he patted his trembling body and muttered.

“I just hope that they are not back…”

“Master, the people from the Zhuang family have come to cancel the engagement.”

“My fiancé whose beauty was said to be capable of causing the downfall of a city, finally decided to throw me away?”

“I think so.”

“I want to see this legendary beauty, and confirm whether this bastard is as really great as people said to have no flaws in all 360 degree, a picturesque appearance however you see him; does he need me to help him open the corner of his eyes (Epicanthoplasty) or reshape his chin (Genioplasty)?”

“Actually, he didn’t come.”

“He didn’t? He didn’t even come to cancel the engagement? What a wicked b***h.”

“He definitely will get karma.”

- Description from Novelupdates

Apollo Kaiser, a boy who bore the unlucky fate of being unable to grow strong, was condemned by his family.

Discarded by his mother and abused by others, Apollo gives in to his rage.

However, this action results in his death. Many would believe it to be the end, but Apollo's death was a required catalyst.

The Demon Monarch System finds its heir and attaches to his soul, bringing him to a new world where he starts his journey to supremacy.

This difficult journey rife with conflict, conquest, and brutality shall serve as Apollo's temperance.

Watch as the heir of the Demon Monarch rises above all, conquers Sin, subjugates unthinkable enemies, and even brings about the destruction of worlds!

The rise of the next Demon Monarch begins...

After living in a desolate land, where there wasn’t even a single blade of grass and hunger was an everyday reality, Min Sung finally returns to Earth: his home.