World Isekai - Chapter 1: [And win]

The story is about a boy entering high school, who answers a strange call from a public phone one night. The caller challenges him to a bet: She’ll remove the birthmark which he sees as the cause of so many problems, and he’ll have fifty days to win the heart of a girl he’d considered far beyond his reach. And with this, a very strange summer begins.

Hell Ghost Wang Wannian is born again, smiling and proud!
What?
Are you a soldier, will the tank drift?
You are a master, can you give birth to dragons and tigers?
You are a superman, can you call the wind thunder?
Excuse me, I am not targeting anyone, everyone in my eyes, it is rubbish!

- Description from Uukanshu (translated)

[Female Lead: Little Princess of the Cat Demon Clan] “Get off of me,” the man's voice carried a hint of helplessness and restraint.“I won't,” the girl shook her head, her arms tightly holding onto the man beneath her.“Be good, I can't sleep like this.”“But I always slept on top of you before.”“That was different... you're a human now.”In Capital City, a decisive, cruel, and cold-blooded mysterious head of the household unexpectedly gets saved by a tiny kitten, hence turning into a devoted slave to the cat, shocking all his subordinates.However, when one day he woke up to find the kitten in his arms had turned into a lovely and soft young girl, the head of the household was dumbstruck.Ask what's going on? Of course, it's a nurture story~Ask what to do? Naturally, continue to spoil her, just in a different way~“Young Master, everyone outside is saying that you have some special fetish. Why else would you spoil a cat to such an outrageously lawless degree?”The head of the household declared, “You know nothing, that's my wife.”This book is free of stale tropes, with fresh material, and is clean in regards to relationships. [The new book “Mr. Lu Has Made the Blacklist Again” has been released]

Introduction One:When Jiang Shouzhong finally resolved to help his wife vanquish demons and uphold the righteous path of the human world, he saw nothing but piles of white bones. Standing atop the battlefield of Asuras, the demoness was none other than his former wife.——Introduction Two:Above the temple halls, beneath the rivers and lakes, where the world of humans and demons divide, along the righteous and evil paths, countless charismatic individuals weave lives full of fireworks, unable to exhaust the tales of snow, moon, wind, and flowers.Kings and generals, peddlers and pawnbrokers, scholars and swordsmen, fiends and phantoms, they are all but pages in a book—each of varying thickness, some with twists and turns, others dull and ordinary, filled with ups and downs, joy and sorrow, or a mix of good and evil, with causes and effects unending.And the book of Jiang Shouzhong's life is undoubtedly the most captivating of all.——