Mythical Beasts: The Useless Lady Is a Genius! - Chapter 280 - : Treatment

I, Lu Li. had an agreement with the system; once the plot was completed, I could go home, but the system played me dirty.

Demanding another round, claiming the plot had gone awry.

Let’s perish together, scumbag system.

You’ll never see me endure such humiliation again.

Sadly, I didn’t die.

Filled with rage, since you won’t let me die, then I’ll make those who once shamed me, hurt me, and betrayed me in haste, pay the price.

The protagonist is not humble, not clinging…

Five years ago, Gu Jiayu, who climbed out of the mountain nest, entered the entertainment circle in order to cultivate, and in order to overcome the shortcomings of emotional gaps, he used an excellent acting skill to hook up a Chinese “little nobleman” abroad. After a month of falling in love and feeling love, he ran away with guilty conscience after the other party proposed marriage.

Five years later, Gu Yingdi had become popular all over the country, but he had a four-year-old son beside him. 

One day, the little handsome guy pointed at the man who took up the entire page in the financial newspaper and said, “Dad, this man looks like me!” Gu Jiayi glanced at the calm, handsome man in a suit and shoes in the newspaper, and asked with a guilty conscience, “He has an onion head, and his body is black and black like the top post. Are you sure you look like him?” That night, “Top Door Post” came to the door … Gu Jiayu, “My son, hide your tail!”

- Description from Novelupdates

Ajax was an orphan who survives a massacre along with his friends but unfortunately gets separated from them.

Fortunately, after a turn of events, he successfully gains a system which helps him increase his cultivation, but doesn't know what it is called.

But he knows one thing for sure, this system is very powerful and helpful in taking his revenge.

“Whoever you are, I am gonna find you”, Ajax mumbled himself with a disgruntled expression.

In a world where Summoning of an elemental spirit is done through a dream when they are 15 years old, Ajax with the help of a system and his summoned spirits sets out on a journey to seek revenge against the mastermind behind the massacre.

Side story of Kyoukai Senjou no Horizon bundled with the first press release of the 1st, 3rd, 5th and 7th Blu-ray volumes of both seasons of anime.

This side story follows Asama, Kimi and Mitotsudaira aboard Musashi one year before the beginning of the main story, as Asama is considering to create a music band together with her two friends for the next festival in Aki, a territory under the governance of K.P.A. Italia.