Heroines, Villainesses, and the Hero's Yandere Harem? I want them all! - Chapter 17: Scripted Fate

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.

Three thousand years ago, gods and Buddhas disappeared all over the sky, and the inheritance of practice was broken. It was not until the ancient civilization was destroyed that spiritual energy recovered. Ten thousand races took advantage of this to invade.

Five hundred years later, the human race gradually rose up and began to fight for control of the land of China, and counterattacked all races.

Three hundred years later, Fang Yi, the Lord of the Great Dao, slaughtered all clans, destroyed all the heavens, stepped out of the myriad realms, and fought against the Dao of Heaven.

In desperation, Fang Yi sacrificed blood to eight hundred small worlds, reversed time and space, and was reborn nineteen years old.

In this life, he wants to live a more relaxed life, perfect his Dao Xin, and conquer the Dao of Heaven again.

- Description from novelbuddy

“Mu Yingying,” or the Seventh Young Lady of the Mu family, vividly remembers the cruel past life she endured.Due to the evil schemes of her stepmother and half-sister, the three descendants of the Mu family met tragic ends...The eldest son died dishonorably, the eldest daughter became mentally deranged,And she, the second daughter, was unjustly sentenced to death!Even her own father heartlessly cast his children aside...Now, she has returned once again, to the third year of the Xingping era, when “Mu Yingying” was only 5 years old.She has come back to the starting point of everything!Very well... She will drag the traitors down into the depths of hell.Her return is not for forgiveness... but to reclaim what is rightfully hers and to exact retribution on those who wronged her!“Death is not the end, but the beginning of the regret you will face.”

Surgeon Guan Ryo Is reborn in Naruto’s world! Enjoy his trip as he uses his knowledge of the story to find his path in this troubled world and eventually stand at the top of Konoha!