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

Siora's soft lips enveloped Damian's dick, sucking all the way down. It was not a simple task to get all of his manhood inside her throat, but Siora did it, and was happy with it.

The blowjob sounds echoed through the forest, and anyone who might be nearby would hear it — Damian and Siora hoped no one was there.

Damian relaxed near the edge of the water pond, enjoying the feeling of having a gorgeous elf like Siora sucking him. She also rubbed his dick using her big boobs. And hell, Damian loved that.

"I want you to fuck me," she said, and then went to sucking again.

She never had sex before, and the first person to taste her would be a human! The other elves wouldn't be so happy about that if the information leaked.

"You don't even need to ask," Damian said.

Damian got up, placing Siora near the edge of the water pond. She placed both of her hands on the ground, using it to equilibrate her body.

Pleasant Time in the Waterfall and Attack (R-18)