The Ruler Of Darkness - Chapter 14Book 3:

After Xia Feng transmigrated, his heart was mysteriously removed.In its place, a defective demon heart capable of sustaining life only for eighteen years was implanted.This is a magical heart that can sync with the power level of its target.To stay alive, he bound himself to the ultimate villain of the future, a Destructive Witch who was destined to destroy the world.The stronger the Destructive Witch becomes, the stronger he becomes!Thus, Xia Feng realized, it's not my fault for stirring up trouble: “Miss Witch, I admit you're strong, but not strong enough!”

Lin Chen, a poor boy from a model agency, occasionally inherited a peerless doctor. From then on, he has been unparalleled in medicine, able to resurrect the world and help the world.

He contends with the sun and the moon, and takes his life to heaven and earth. And all this began when that sexy and beautiful model gave him an ancient book…

- Description from MTL

“You saved me, to repay you, I decided to devote myself to you!”An Ran just did a good deed casually, but was entangled by this black-bellied, ice-cold face.“No... no need, I'm still young,” An Ran sweat madly inside, waving her hands repeatedly.The man, however, was very serious: “I will wait for you to grow up.”But, isn't your image of throwing a tantrum too unbearable to watch?Didn't you say you were like Cold-faced Yama, aloof and abstinent, with an eight-thousand-meter glacial demeanor?A certain brotherhood wiped a bitter tear and said, what's the big deal about throwing a tantrum? Neglecting friends for love, betraying friends for affection, and always have to be ready to be fed dog food. They just want to ask, such a brother, can we return him?

From the age of 7, Qiao Qiao realised that her family wasn’t quite the same as her friends’ families.

Her father, dressed in all white, said, “Our girl should learn to cultivate immortality with me!”

Her mother, dressed in battle armor, said, “Our girl should train her body to protect herself!”

When discussing it, they decided to solve it with a duel outside.

Her brother secretly asked, “Qiao Qiao, do you want to be in the entertainment industry with me?”

Then, her brother was kicked out of the house by her parents. She prayed that he was okay out there. 

Qiao Qiao sighed. She was really worried about this family.

She silently collected mech building materials. There was no other way, if she learned how to use mechs, she would be able to get a good job. Unfortunately, her unreliable parents didn’t understand.

It seems like the burden of supporting this family was handed over to her.

- Description from Novelupdates