MTL - The Manga of Ten Thousand Realms - Chapter 346

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

Power comes with a cost... and it was something she was willing to trade her soul for.A few nights before her wedding, Lauren sought a way to break her fourth engagement. Known for her bad reputation as the rebel princess, she was the only lady who had the guts to step foot on the Everston mansion, the house of a notorious warlord, in the middle of the night.She offered him a wicked alliance that the entire kingdom did not see coming: a marriage.A vixen pretending to be a damsel in distress and a man whose crimson eyes screaming for bloodshed. Could something blossom in this treacherous dance of lies and deception?--“Are you upset?”She eyed him sharply. “Should I be honored that I got tricked by you, milord?”He drank the remaining wine in his glass with one gulp and put it on the wooden table.He stepped in front of her. His hand was on the rail on her side while his other hand grabbed her glass and finished her wine before putting it down.The way his Adam's apple moved with his every violent gulp made her feel a tickling heat around her nape.When he brought his attention back to her, he licked his lips to wipe off the trace of wine.“How shall I make it up to you then?” he asked with his deep voice, like a seductive devil asking his victim how she would like to be killed. Dangerous yet… enthralling.

Holo’s life was once a series of relentless hardships—bullies at school, abusive parents, and heartbreak at the hands of those he trusted. After a failed suicide attempt, a mysterious man offers him a deal: help rehabilitate four psychopathic girls, and in return, earn ten million dollars. Desperate and naive, Holo accepts, not realizing the chaos and danger awaiting him.Each girl comes with her own dark tendencies—Trixie, a violent and feral girl who acts on impulse; Scarlet, a master manipulator who delights in breaking people down; Felicia, a dangerously seductive woman battling a sex addiction; and Eleanor, a cold, calculating girl with a desire to watch the world burn. As Holo works to bring out their humanity, the girls become obsessively devoted to him, their love transforming into something darker.