One Piece: Supreme Check-In System - Chapter 35: Sailing to Fish-Man Island

In a future timeline, the earth was visited by a species known as the Slarkovs.
Having lost their home planet and in search of a new one, earth was the next habitable planet for them.

Humans and Slarkovs made a deal with each other in return for the Slarkovs living on earth.
The Slarkovs traded their technology and knowledge for a new home.
They were similar to humans except for some of them who had slight differences so fitting into the society wasn't a problem.
Over the years Slarkovs and humans began to mate with one another and reproduce offsprings.
This in turn created a new species known as the mixed-blood.
Centuries later mixedbloods could tap into their bloodline and perform unimaginable feats.

Gustav born into an age where bloodline determines everything, struggles to fit with a useless bloodline.
His bloodline only grants him the ability to change his hair color, destroying his hopes and dreams for a great future.
His fate is turned around when an unexpected situation leads to him finding a system that grants him the power to unlock and upgrade bloodlines by completing quests but he's baffled by two quests with a five-year deadline. Success will grant him unimaginable rewards...
But only one thing awaits him if he fails... Death!

Follow Gustav on his interesting journey filled with unprecedented adventures, danger and death, maybe?

Alternative Title: Crossover: Mangēkyo Sharingan In A Cursed World===Support and read advance chapters at: Patreon.com/Zexxxxy====When he woke up, Ryuu found himself in the body of a high school student.His school was an unusual merger—Soubu High, Toyosaki Academy, Shuchiin Academy, and Totsuki Culinary Academy had somehow combined into one.At first, he thought this was just a typical anime slice-of-life setting. That was until he met Miko Yotsuya from the class next door.From that moment, everything started going wrong.Monsters. Ghosts. Curses.The world he thought was normal was anything but. Strange and terrifying entities that had no place in daily life kept appearing.Fortunately, Ryuu possessed the Sharingan, and he soon discovered that negative energy could be absorbed as fuel for his eyes’ evolution.The more horrors he faced, the stronger he became. Step by step, he walked the path of exorcising spirits while growing into an unstoppable force.But as his strength grew, so did the number of extraordinary and beautiful girls drawn to his side…---Miko Yotsuya: “Please help me, Ryuu-san.”Mai Sakurajima: “You’re the only one who can see me.”Utaha Kasumigaoka: “Surrounded by beautiful girls… is this how you plan to revive your clan?”===================================Worlds Included: Jujutsu Kaisen, Rascal Does Not Dream of Bunny Girl Senpai, Saekano: How To Raise A Boring Girlfriend, Mieruko-chan, Oregairu & more.====All rights belong to the original authors, I am just a mere translator that's translating this because i loves the idea, the story.

After transmigrating to Hong Huang and becoming a minor shaman in Hou Tu’s tribe, Chu Xuan shocked everyone by repeatedly offering poisonous plans in order to avoid becoming Cannon Fodder in the Great Calamity.Who would have thought? The poisonous plans were incredibly effective.The Demon Clan established the Heavenly Court and united countless races?Chu Xuan: Establish the path of the Heavenly Tribulation and share the power with the Heavenly Court. From now on, all beings must undergo the tribulation!In Zixiao Palace, it was said that those without Primordial Spirits couldn’t listen to the Dao?Chu Xuan: Create the path of the Heavenly Demon as a tribulation for Primordial Spirits. All who possess one will suffer!During the war between the Wu race and Demons, countless souls were left with no place to go, and the Calamity Qi of heaven and earth ran rampant. Who asked Hou Tu to reincarnate?Chu Xuan: If you don’t work hard in your cultivation, you’ll end up as brothers in the Ten Thousand Souls Banner.…Chu Xuan: I have a plan that can completely resolve the Great Calamity of the Demons and Wu races!Hou Tu: Chu Xuan, calm down first. Things haven’t come to that point yet.

Jiang Xinyu transmigrates into the 1950s without parents. In a time of famine with nothing to eat?But she just wants to live the life of a happy-go-lucky slacker...So she has to roll up her sleeves and fight!Carrying space, full of blessings!Heaven's favor, what you think is what you get.While others starve, she gains weight, determined to live out the luck she didn't have in her previous life.