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

Alanna's body trembled the moment she heard the roar, and for a split second, she thought about running away, just like how she did it the last time, but the sight of Damian eased her heart.

It would be useless to return just to run away like last time, and despite the roar scaring her, Alanna stood her ground, trying not to make a fool of herself before the man who saved her.

"Calm down. Something is going on here, but I can assure you it is not a powerful beast like the roar may sound," Damian said.

She believed in him, or rather, she had to. The thought of a massive creature lurking behind the fog made her uneasy, but if Alanna wanted to find her friends, she had to keep going no matter what, and having Damian's company gave her enough courage to move forward.

They kept walking and walking, and the more they did, the roaring sound did not change.

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