The Laws of Cultivation: Qi = MC^2 - Chapter [B4]: to 4

This story is about love, revenge, the quest for power, and the right to exist.After being betrayed by his childhood crush and losing his loved ones to a human raid, Erik, a werewolf, ends up on another planet for seven years before he returns to a vastly changed, post-apocalyptic Earth.Originally a timid, unadventurous man, Erik has become far more dominant and assertive upon his return.Together with him comes his beloved but ruthless soul-bound partner and fairy, Elora, who wants Erik to rule and conquer with her by his side.Elora's presence alone makes Erik more powerful than others at this level, but will he find out what else makes him special?Follow them as they use the knowledge and strength they gained on Söl to navigate an Earth filled with magic, vampires, shapeshifters, and more.Along the way, Erik and Elora will meet a diverse cast of characters, some of whom Erik might have known in the past, and some he did not, but all with their own story and desires.Will Erik be able to take revenge for the betrayals of the past?And what else will he discover along the way?

Yeho is a distant relative to a king in a small kingdom. Even though he is a distant relative, his house was very poor, and his mother was addicted to gambling. One day North Empire asked for Princess Sooyoung to be a concubine of an old Emperor because she was known for her beauty. But the king really loved his daughter so instead he ordered Yeho’s older sister to disguise as Princess Sooyoung and marry the old Emperor.

Yeho told his sister to run away with her lover, and his sister had to leave her younger brother alone with his mother. After she ran away, Yeho asked his mother to give the things back to the king that she got for trying to sell her daughter, but his mother already used the gifts to pay off her gambling debt. He was trying to give the gifts back to the king to take away his order, but now he can’t do that anymore. He tells his mother to run away, and he disguises as his sister to go to North Empire.

After he got there, he was trying to tell the Emperor the truth and take away his life, but the Emperor went out for few days to look around his empire. When the emperor came back, he wasn’t as old as he thought.

To save her family, she got married and divorced not for her own will. Due to the “derailment”, she was left penniless by a divorce settlement. She finally knew it was Di Juehao, her handsome, indifferent and rascally husband of the rich family, who plotted everything! However, she gave him an impolite impact on The day they divorced! Five years later, Wen Nuan made a good showing and became Top 1 designer of a world’s famous brand. She returned with two kids. Unexpectedly, she was forcibly taken by her ex-husband Di Juehao to the hotel to have s*x as soon as she returned. In the end, Wen Nuan gave him 10 yuan and left with pride: “Hey, 9.9 yuan is the market price for a top 1 male prostitute now. The rest is the tip for you!” But when she rushed to the company, she was surprised to find that his boss was…

- Description from Novelupdates

I returned after 10 years.