One Piece: God of Space - Chapter 45 Analyzing the Situation

In the 21st century, divine physician Qian Jiujiu was targeted by a bomb when she was rescuing soldiers in the battlefield. Because of the bomb, she crossed the to a new state and became the second daughter of concubine in Qian familiy. Because the taoists asserted that she would “curse parents”. Therefore, she was sent to village outside capital for 16 years not long after rebirth. This time, her father took her home, just to let her marry Mu Yexiao instead of her lineal sister.

Who is Mu Yexiao? The sixth prince of the state, the favorite prince of the emperor. Because he was injured in the battlefield, his legs were disabled, and he was unable to bear children. In anciet time, he also failed to seek effetive medical treatment. The royal family decided to marry the legitimate daughter of Qian families to Mu Yexiao, in order to drive away bad luck.

However, as a modern doctor who combines traditional Chinese and Western medicine, Qian Jiujiu won’t obedient to fate? She used her wonderful medical skills to heal the Mu Yexiao’s disabled legs, hoping this prince could support her. But who knows he was very shrewd! Who yielded to whom? It’s difficult to say.

- Description from Novelupdates

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?

A 34-year-old NEET otaku, chased out from his house by his family, found that his life is reaching a dead end. He then recalled that his life could actually have been much better if he had made better choices in the past.

Just when he was at the point of regret, he saw a truck moving at fast speed, and three high schoolers in its path. Mustering all the strength he had, he tried to save them and ended getting run over by the truck, quickly ending his life.

The next time he opened his eyes, he is reincarnated to a world of sword and magic as Rudeus Greyrat. Born to a new world, a new life, Rudeus decided that, “This time, I’ll really live my life to the fullest with no regret!” Thus starts the journey of a man yearning to restart his life.

From the poor little girl who ate hundreds of meals in the small mountain village to the wealthy lady, the five-year-old Nuan Nuan lived a life of being favored by the whole family.

The elder brother is cold and reticent, he is the heir of the Gu family

The second brother is a genius with a gentle personality and high IQ, and the youngest professor in the research institute.

Third brother is a top star with fans all over the world.

The fourth brother is a cold and talented doctor who can save his life in the hands of the king of hell

Wu Ge is a talented painter, and a painting is worth millions.

Brother Six is ​​a wild school bully

Seventh brother has a black belly and a bear child, he is the king of children.

And Nuan Nuan was favored by his brothers after returning home.

Note: Not all elder brothers are biological elder brothers, there are cousins ​​and cousins.

- Description from novelbuddy