Slave Harem in the Labyrinth of the Other World - Chapter 137

Going for a swim, she ends up in an ancient wild Beast World and ends up being brought home by a handsome wolf.
She wants to stick to the handsome wolf, stock some salt, farm some land, look at some handsome men and grow old like that, but the handsome wolf pounces on her every day.
What? He wants her to have babies?
NO~ NO~ NO~ There is no happy ending to interspecies marriages, hurry and let go of me handsome wolf~

- Description from Novelupdates

After crossing into the world of Harry Potter as Ron's twin brother, Hoare Weasley awakens the “Pay-to-Win System,” which allows him to grow stronger as long as he has Galleons.Others rely on hard work to study; Hoare relies on Galleons.Others depend on wit to learn; Hoare depends on Galleons.Others rely on talent to improve; Hoare still depends on Galleons!As long as he's willing to pay, he can take down Malfoys, Blacks, Lestranges—anyone! With enough money, he could even take a swing at Dumbledore himself.Thus, the title of “money-obsessed lunatic” quietly rises within Hogwarts.You-Know-Who: “I hear your magic is impressive. I want you to kill someone for me.”Hoare: “One hundred Galleons.”You-Know-Who: ...

Damian, a Centurion of the Punishment Unit of the Baroque Kingdom. “Damn it.” Just once. If I were given just one more chance… ‘I would have truly conquered the battlefield with these guys.’ At the age of 30, he closed his eyes on a nameless battlefield. But when he opened them, he found himself back 17 years in the past. And this time, he had a perfectly functioning mana core that could wield magic. ‘This time.’ I will rise higher than anyone else. I won’t be swept away by the turbulent times. ‘I will conquer.’ Damian, who has returned to the past, wields his spear toward the world.

After the Catastrophe, every rule in the world was rewritten.