I Can Extract Game Items - Chapter 159: The Abandoned Caverns

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.

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

The world is up for sale, and Robin is making an offer.When Robin Waybright became the Merchant Hero, all of Pangeal turned into his marketplace; for the Merchant can buy and sell anything. Youth, skills, memories, hair color, joys and illnesses… in the trade of power, every deal can tip the scale.And Robin needs power. His homeland of Archfrost teeters on the brink of collapse, the sinister Demon Ancestors plot in the shadows, and twenty-one other Heroes, each with their own Class, have been chosen to save the world of Pangeal. Not all of them are friendly. There’s work to do… and profit to make.Cover by Dinovoila and Gharbi Zouhayer.