Shinji Matou at Your Service - Chapter 1009: Responsible?

In the fifth year of the apocalypse, when it was coming to an end, Sunshine Raine died, killed by her cousin and her fiance. Sunshine only had one wish, if she could go back in time, she would not make the same choices she had made. In this dog eat dog era, she would be the top dog.When she opened her eyes again, she found herself back in time, one month before the apocalypse.A few changes had happened, one, she was in bed with Hades Quinn the father of her foolish fiance in her last life. Not just that but they had a marriage certificate!Two, her sister was also reborn and in this life, she had chosen to marry the foolish scummy ex.It made Sunshine his stepmother!! Granted he was adopted by her husband but it was all the same, she was now his mother and her cousin's mother-in-law.Despite the surprises, Sunshine focused on the upcoming weather disasters, monsters in the mist and humans that were more savage than those monsters.With a system in hand and knowledge of what was coming, she used her wealthy husband's money to stockpile, sold the family property and went on to rise again as the apocalypse queen.While her cousin was being starving and suffering with the man that was pretending to be a fool, Sunshine was being pampered and kissed by the male lead.While her sister was being forced to work by the fool, she had three step sons to work for her.As promised, she became top dog.

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!

Great Cultivator Chen Fan had failed his Tribulation period, but after a dream, he had returned to Earth, when he was young, five hundred years ago.

“In my past life, I reached the peak in the universe. I looked down upon the myriad of worlds, but with no one accompanying me. In this life, I wish for both.”

- Description from novelupdates

5 years after the world changed, the final boss appeared.