Betrayed By One. Bound To Three - Chapter 27: jealous?

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

A world where the [Demon King] was defeated by a [Hero] that came from another world. People carelessly forgot about their fear of the [Demon King] and of monsters, living in peace.

In a forgotten and run-down cave in the mountains, a new monster that should not have been born was given birth.

The monster’s name was the [Black Ooze]. It was nothing exceptional other than its black color, an ordinary slime.

However, this slime had the special characteristic of being able to take the abilities of the living things it swallowed. It preyed on an insect that had paralytic poison, as well as other animals. Following that, it attacked a human, obtaining his knowledge and [Desire].

Before long, the monster established its target as the female mage that came to explore the cave.

This world still wasn’t aware.

Noah Weaverheart was nothing but a poor boy with zero talent in Magic.Stuck at the Apprentice Magus rank for years, he was bullied and looked down upon by everyone in the academy.His pathetic life met an end at the hands of an arrogant noble, who decided to bury him and go about his day like nothing happened.However, as he drifted in between the space between life and afterlife, a set of notifications appeared before Noah.[Suitable Host Found!][Initializing The Supreme Magus System!][…][ERROR! ERROR! ERROR!]Before he could understand what was going on, he found himself jolted back to life, but the notifications wouldn’t stop flooding his vision.[A bug has been discovered in the system!][Trying to fix bug…][Fixing Bug…][…][ERROR! FIXING FAILED!][ERROR! SYSTEM FALLING APART!][…][ERROR! BUG UNABLE TO BE FIXED!][The system has been corroded by the bug. All parameters broken down. Required EXP for leveling up now fixed, limits on quests completely removed, Penalty on quests disabled.]At first, he thought it was a disaster.Then he realized—this bug wasn’t a curse, but a huge blessing in disguise!With no restrictions holding him back, Noah could now level up endlessly—faster and stronger than anyone alive.From worthless trash to an unstoppable force, he would rise above all… becoming the most powerful magus in existence!But the more he learns about his broken system… he realized the bug might be something far greater, and far more dangerous than he ever imagined.