MTL - Wild Princess: Marrying an Ugly Prince - Chapter 68 : How to destroy together?

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

One day in the faraway Blue Boorish Mountain inexplicably appeared groups of scoundrels who came to reside there. It was said that those scoundrels came from the You Kingdom, Yen Kingdom and many others due to their failures in battle. And due to its dangerous terrain, no one had dared to conquer the Blue Boorish Mountain. As a result, this place obviously became a paradise to the scoundrel and thieves. They resided there and ruled the place.

They had also built up the Illusory Perennial Domicile, which meant a place that was their lifetime home. There was a group of scoundrels who had appointed themselves the Great Nine Bandits, and they were seen as the best baddies in the area. They built up a school in which the children of the Illusory Perennial Domicile would come and study only survival skills.

In such a small place appeared an orphan student named An Zheng who also came to study there. He was really a useless orphan in the people’s eyes due to his cowardice. They even said that he was a chicken who did not dare to do anything for himself even in fighting for himself, and no one cared about such a coward except a ten-year-old child, Du ShouShou, his only friend. As a result, he was the center for such baddies to cause trouble.

However, no one knew that orphan An Zheng would change his life forever as he went to a dead end.How powerful was that orphan? How much effort did An Zheng have to make in order to satisfy his passions of the devilish elimination? How would the life of his friend, Du ShouShou change after his after death spawn? And might the Great Nine Bandits be the invincible ones? Was he good or evil? Was his power strong or weak?

Was his world in perfect order or chaos? They were all questions that the little child An Zheng needed to discover during his journey.“Bring happiness to loyal people but chide the evil. However, if the treatment goes wrong, law will become a tool for the evil to force the good, preventing executors. Find a repugnant gateway to pass. Great things win cruel tricks. We learn from the idea of God but we reject the power of Him.”