Overpowered Archmage Doesn't Hide His Talent - Chapter 155:

Sangyan turned into a widow known to bring misfortune to her husband. Despised by her in-laws and disdained by her own family, she volunteered to retire to a remote estate to live out her days. At this moment, she caught the eye of a tyrannical emperor with a strange illness - being near a woman caused him unbearable itching and relentless vomiting.Hence, the 26-year-old emperor had never favored any of his consorts, let alone sired any heirs. The imperial harem constantly pressured him for offspring. The common people also yearned for a royal heir. When they learned that the tyrant held affection for Sangyan, the widow with the ill-fated destiny, the entire nation opposed their union.Eventually, the entire country pleaded with Sangyan to bear children for the sickly and tyrannical emperor...Beauty widow with a deadly fate VS Emperor with allergy to women

Chen Rui, an otaku from earth, is reborn into a human body in another world, who falls into the legendary evil, brutal world of the devil called Mozu where humans are treated as food. He has to survive while facing horrors of the devil, violent dragons and a variety of power enemies depending on a strange super system chip and his wits. Surrounded by Devil’s beauties such as black-bellied lolita princess, cold queens, violent dragons, charming poisonous devils …

Wanting to live in the Devil’s world is hard! Wanting to live in the Devil’s world as a human is harder! Wanting a human to be the devil’s son-in-law is hardest!

Let us see how a small otaku uses power and strategy step by step starting from an ordinary human to writing a legend as the devil’s greatest son-in-law.

- Description from Novelupdates

…but it seems pretty doable.

What is the most painful thing in life? What is the happiest thing in life?

The most painful thing was that after untold hardships, for that small glory at the end but was returned back to the starting point in just one night.

The happiest thing was that after returning back to the starting point, without doing anything, was able to become overpowered overnight.

Zhou Jian in just one day, experienced his life most painful and happiest thing.

The most painful thing was his painstakingly raised professional Thief game account in the online world was “lost” by the system.

The happiest thing was the reason behind his game account loss. The Thief from his game account had appeared in the real world. And become a controllable God of Thieves.

In short, this is a relaxing YY (tl: Chinese slang for light perversion) story, full of plots where playing the pig to eat the tiger. The protagonist is a very righteous young man. Occasionally, he will be wicked but also because he was forced by the author….

- Description from Novelupdates