Ryongul

[Mature Content]

[NO NTR]

The day dungeons appeared on Earth, everything changed! From ordinary beasts to monstrous ones, attacks were common throughout the globe, and no one was safe.

After countless studies using these beasts as subjects, Humankind developed a serum capable of awakening incredible abilities in humans, leveling the battlefield.

With the serum came heroes and villains, those who wished to use their powers for good or bad.

The Garmony Upper School was a place for the elite with the sole purpose of creating heroes to fight the villains and explore more of the dungeons after the beast attacks increased for no apparent reason.

Damian Romero, a youth who received the serum after turning 18, yet got no unique ability. It was not uncommon for one to not receive power, but it was still a blow to one's pride.

He went rogue after the news, drinking alcohol and having a good time with women, and it was at that moment, when he was putting his toy to play, he got a surprise.

[All-in-One System Unlocked]

Damian's unique ability was a system with multiple functionalities, but after he studied it, it seemed this system worked with a different type of coin called Erotic Coins!

Improve his body? Buy any item or unique ability from his system's store? All Damian needed was Erotic Coins, and he knew how to earn them!

~~~~~
The MC will not start as a villain, but something will shift his mind in the future.

All-in-One System: All I Need is Erotic Coins

Damian analyzed the fallen tree, and it looked nothing like it has been destroyed by a beast. He was expecting them to lie, but so bluntly? What did they think Damian was? A stupid person?

Anyone with some sense and knowledge would see the facade, and Damian was one of those people.

"Come on, we are close," one elf said when it realized Damian was not moving.

"I'm going," Damian said with squint eyes.

He was not buying that bullshit, but still played along with it. If they truly tried something against him, then they would pay!

"Look! That's the cave the beast is living in," the elf leader said, pointing at a cave.

They all hid behind trees, crouching and staring at the cave's entrance, looking for any clues of the beast. Damian was among them too, and the cave entrance — which was all mud — did not have a single footprint for the beast!

Killing Them All