Martial King's Retired Life - Chapter 59Book 15:

Aric Valerian, the fourth prince of the Valerian Empire, bears many titles: The Forgotten Prince, The Whore’s Child, The King’s Bastard—names that have been spoken more than his own. Born with a crippling illness and devoid of mana or ki, Aric was a disgrace, scorned by his family and the court. But when the gods cured him and gifted him the strength to fight, Aric dared to hope. He sought glory in battle, only to be betrayed by his brother and sent to die in a hopeless war. In his final moments, as death closed in, a mysterious text appeared before him… [Would you like to change your fate?] After being given another chance, Aric embarks on a ruthless journey to claim absolute sovereignty. [Ki Circulation Mastered: Strength +10] [System Upgrade: Advanced tactical planning unlocked] [Hidden Fortress Established: Stronghold security +15%] The forgotten prince claws his way through the treacherous landscape of imperial politics, he is forced to make impossible choices, each decision pushing him further down a path soaked in blood. He learns that true power demands sacrifice, and the price of vengeance may be his soul.

Three Days of Happiness is a novel by Sugaru Miaki, also known as Fafoo. It’s a rewritten version of the story originally posted to 2ch.

The premise of the story revolves around a shop where one can sell away the remaining years of their life, and the consequences of doing so.

“I Say A Little Prayer” is a short related story which was posted along with the novel’s release. It spoils some things about the main story, but nothing major.

Hakuto's life changes forever when his father Shin— a man with highly questionable morals—marries Kagura Kurotsuki, the CEO of a multinational company, and they move into her luxurious mansion.There, he meets the alluring daughters of his new stepmother: the seductive Yuzu—who doesn't hesitate to tease both her new stepbrother and her stepfather in ways that are... rather bold—and Rika, more introverted and irritable, yet just as sensual.But nothing is truly as it seems...Kagura is a succubus, but Rika and Yuzu are different.They were born from a demon and a vampire—something that shouldn’t be exsiste.Because of that, demons, vampires, even humans want them.But Hakuto won’t allow it.He’ll never let anyone hurt his beloved stepsisters.

The cousin isn’t called Biao Ge. He has his own name. His name is Cheng Jinyu. From the phrase—– Wo Jin Huai Yu (to hold and cherish a beautiful jade; a person with good moral values), it’s the name his father gave him.

But Chen Yuze calls him Biao Ge, so Biao Ge became his name.

Biao Ge has a sworn enemy, his name is Gu Bokai. Biao Ge doesn’t know how he provoked this person. He detested himself very much. Like being disgusted with sh*t in a garbage can.

However one day Biao Ge was told to marry Gu Bokai. As for the reason, an extreme pain in the ass, because Biao Ge’s life is hard!

Gu Bo Kai has married three times and now has three dead wives…

Gu Bo Kai: No, absolutely not!

Mother Gu: First cry, second stir up trouble, third hang oneself (throwing a temper tantrum). Continue to get married, or I die and let you see.

Gu Bo Kai: Why?

Mother Gu: He is tough, can avoid being killed by you and can also have children.

(Shou and Gong have no kinship. Biao Ge is what others call this person. It’s like a name)

- Description from Novelupdates