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 missed it so much, just like Serana. They had been away for a long time, and their sex was always something to behold.

"Yes, harder, ahh," Serana moaned, and her sweet voice echoed alongside the sound of slaps.

The movements of their hips were frenetic. Damian grabbed her hair with one hand, and slapped her big pale butt with the other, making it turn red and have his fingerprints on it.

Serana rolled her eyes, sticking her tongue out like the horny girl she was. They remained in the same position until Damian asked something.

"Can I get the other hole?" he said.

"Hell yes. Wreck my asshole too," Serana said, looking excited after hearing the request.

She was down for it no matter what! Serana used both of her hands to stretch her asshole. Damian spat on her hole, and pierced his dick right through it!

The Other Hole and Shop Idea (R-18)