MTL - Guardian of Douluo - Chapter 18

Wen TianHe originally thought he was a man who’s going to be a domineering chairman. But in the end, he became the man alongside the domineering chairman.

The sharp edge of a knife is difficult to cross; thus the wise man said that the path to salvation will be hard.
—Mao Mu, (Blade)

The blade of a sword must be sad for its lack in friendship. Because no matter whom it wants to give a hug, the other would be divided into two.
—Vietnamese Overbearing Chairman, Si Guan (Silence is Golden)

- Description from Novelupdates

Leo is an academic genius who enrolled in one of the top universities in the world for the rich and powerful, but he was born in a common family, which was more than enough of a reason for the other students to mess with him.

Shi Man was the best special agent in the organization, and she was supposed to retire in peace, but they came after her to purge her anyway. She died exhausted after turning the tables against the organization’s agents… but was reborn, transmigrating into a book as its villainess! The villainess’s family is rich and powerful. Being the only daughter, her mother and brothers would pamper her out of control, and she was engaged to the male lead at birth. Yet, the body’s original owner messed up big-time despite being dealt the perfect hand. She harassed the female lead to win the male lead’s attention and affection until she eventually incensed the male lead. He threw her into the colosseum ring, where she was torn to pieces. Her family naturally went all out to avenge her and ended up suffering multiple casualties as they fell into desperate straits…

On the other hand, when Shi Man reincarnated, she told the male lead that they should go their separate ways and pretend they never knew each other even if they met again. She even paid the female lead with emotional duress compensation and told her they had nothing to do with each other from then on. However, after parting ways with them and preparing to begin a new life, the male lead regretted his choice and started wooing her. The supporting male characters who were never interested in her also had a sudden change of heart, and even the female lead was now offering to be her follower! Staring at the mob flocking around Shi Man, the Shi family was furious. “She belongs to our family! Stay away!”

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.