Martial King's Retired Life - Chapter 23Book 15:

Xie Xi was someone with luck off the charts! The advantage was that any game could be easily cleared. The disadvantage was that all games were boring! Then one day, the words ‘Game loading’ appeared in front of his eyes and he began to clear real games!

Lu Chen had a dream, an incredibly long dream.. The dream world was familiar yet at the same time unfamiliar. Singer, actor, freelance writer, he actually went through three sections of different lives in a dream world! When he woke up, Lu Chen thus embarked on a bright road of becoming a perfect superstar!

- Description from Novelupdates

After being reborn in a sci-fi ABO world, Xi Wei became the newly born son of the Imperial King. He thought, as the emperor’s son he could live a carefree and imposing life, but unexpectedly the First Prince is actually an omega? What the hell is an Omega?

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!