Naruto System in One Piece - Chapter 521: Reversal of Form

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?

Regaining the memories of his previous life, Cyril realised that he was an otome game’s character, the villainous daughter– Sophia’s butler.At the rate things were going, Sophia would eventually have the prince stolen away from her by the heroine, fall into darkness, and be executed.Wanting to save the villainous daughter he was so fond of, Cyril moved to eliminate all the factors that would cause her to fall into darkness, raising her up to be a talented and beautiful girl who could win the prince’s love, however…

Aldric, a young man from a remote village who doesn’t know much about games is forced by his dorm mates to play the latest and most popular virtual reality game — Magician Online, a magic-themed game with a magnificent medieval world. Armed with curiosity, he played the game without serious intentions. However, unbeknownst to him, he actually awakened the most supreme talent in the game.

Chen Quan Ran is a young general. Rather than return home and see his child wife, Mo Lan, he leads his army in battle for 10 years.

Mo Lan is a gentle bred young lady who has not met her husband Chen Quan Ran since their wedding day ten years ago. Chen Quan Ran’s grandma loves Mo Lan so she feigns illness to lure him home.

Chen Quan Ran can be heartless toward anyone except his grandma who raised him. He returns home and he surprisingly falls in love with his wife who has a secret…