MTL - Demon Slayer Starts From the Proficiency Panel - Chapter 18 [018] The author is here

Han Yang never thought he would one day sell himself into a marriage with another man. He believed his life would be mundane but that man, named HeLian Qing, broke his pre-planned life. Parental debt, a child’s compensation, he had no chance whatsoever to resist, he has no ability to resist.

The one single goal in life of the Strongest Old Sage is to subjugate the Demon King. In an epic final battle, both of them met their mutual destruction at each other’s hands.

However, the Demon King was not completely destroyed!

In order to destroy the Demon King once and for all; post-death, the Old Sage trains in the World of Gods and reincarnates as the Apostle of the Gods, Will.

In the reincarnated future, the Old Sage had become a legend and his former disciples hold the supreme authority in the world. The disciples had created an organization to oppose the Demon King and an academy to nurture the new generation of Heroes.

Thus the Apostle of the Gods, Will (8 year old), enrols into that Academy of Heroes.

This is the story of a boy on a mission to save the world through epic battles while enjoying Academy life.

[You have been killed by the Hero of Light.]

[You have died.]

I had died at the hands of the main character in the novel I had read before.

But I got another chance. I regressed and returned to the time when I first entered this novel world.

Once again, I live in this novel world as an extra character.

Since I have experience and knowledge, especially my World System which had upgraded, I'll do what I want to do.

I will become stronger than the main character.

Four years ago, she was an abandoned heiress casually thrown away by her family.Four years later, she became a big shot with countless honors and huge power.When she returned to her country with her babies, a man was already waiting for her at the airport, “You disappeared for four years after giving birth to my child. I will never let you run away again.”……Her triplet babies are extremely talented.Eldest, “Who dare bully our mommy? I'll hack their information and broadcast their scandals globally!”Second, “I'll make a call to immediately impose a restraining order and freeze their assets!”Youngest smiled at his two brothers, “Brothers, no need to bother! I just mention our daddy's name, and they've come to the building begging for forgiveness.”