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

The cavern they were in began to tremble, threatening to collapse. Ingram was still inside, unable to move. Fear gripped him as he began to accept his impending death. It was at this moment that a beautiful woman with red hair appeared.

"E-Emma? What the hell are you doing here?" Ingram exclaimed.

Emma had not joined the others who were fleeing Lemoria through the tunnels. Her intuition had told her to follow Ingram and Damian, and it seemed to be the right choice.

"Don't speak! I'll get you out of here and take care of you," Emma said, looking around. "And Damian? Where is he?"

"H-He's fighting the demon," Ingram weakly replied, his voice barely audible.

While she was concerned about Damian, Ingram needed immediate care. Slowly, Emma helped him up from the ground and they exited the cave.

Ending the Fight, Captured, and Vanessa