Hell's Handbook - Chapter 378

This is an absurd story of an empress who has traveled to modern times and still insists on rebuilding the Sannomiya Sixth Court without changing her nature.
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Su Junli was very depressed. She inherited a pair of red and green monster eyes, but she is a majestic queen, how could time and space change overnight, and the world was turned upside down, and the beautiful girl in front of her who claimed to be her “Mi Potato” The man called her to “grow vegetables”… You are the only one who grows vegetables, and your whole family grows vegetables. I am the queen!
Anyway, I can’t go back, but the thousands of subjects under the queen’s seat and the thousands of employees under the president’s command are actually the same in management. Since the original “Jun Li” is too useless, let her take over all of them , money, power, status, and of course, those high-quality men who make his heart beat…
An elegant and intellectual personal secretary, a sinister and cunning special assistant, a wild and domineering mafia king, a pure and natural childhood sweetheart, a ruthless No.
The Su family who killed without blood,
In the underworld filled with blood and gunpowder,
Talking and laughing about the ups and downs of the business empire,
Even if every step is frightening, one day, she will stand on top of the world!

- Description from novelbuddy

The strongest Hero in history, Nakamoto Keisuke.

He was summoned to another world in the spring at the age of fifteen years old, and when he successfully defeated The Demon King, he was already thirty-two years old. He had finished his role in another world and returned to Japan, but the reality that had been waiting for him was, “Middle school graduate with seventeen years of blank period” label. He couldn’t find a decent job and had no choice but to spend his days working part-time.

Before such a Nakamoto, a beautiful girl who self-proclaimed had come to return the favor, appeared. “I’m the reward for Hero who had defeated Demon King”, said Angelica, a girl who came from another world that persistently tempted Nakamoto to make her his wife. Together with a high school girl who looks like Elsa, his beloved girl that he lost in another world, Nakamoto with his cheats skills got caught in a harem life.

Hye lived his entire life without a class. After the apocalypse hit the human world, strange creatures invaded and killed humans while new lands were being added.

Systems were given to humans and with the help of the guides, humans started to fight back for their lives. All of this happened under the watch of the venerable beings who were shining stars in the sky; gods!

Hye dreamt his entire life of a chance to prove himself. He was a hard working, earnestly learning and smart youth. However, the apocalypse never was merciful to such humans at all.

Until one day he got a chance to go back in time, when everything started. At this new starting point, he found himself able to finally obtain what he wanted, a class for himself and power beyond imagination.

But will things be this easy for him?

Originally born from a wealthy family, she ends up leading a vagrant life for fifteen years. However, when she is eventually found by her family, she falls into another devious plot and eventually dies tragically.