Paladin of the Dead God - Chapter 4:

“You really want me to save people?”

Looking at the shivering victim in front of him,

Look at the [Owl’s Head Wire], [The Murderer’s Gift], [Universal Anesthetic], [Invisible Potion] in the item column…

Shiraishi touched the hideous mask on his face and fell into deep thought.

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“The Salary Thief in the Distillery”

“What does the vest do to me have anything to do with it?”

“There are limits to being a human being, I choose to be a cat…”

The magic version of Conan

- Description from novelbuddy

When Fang Jin learned that he was in a cultivation novel where the protagonist was a lady and that he had become cannon fodder, he quickly racked his brain to think of a way to save himself.

Everything seemed wrong until he saw it.

[First day as a pet owner.]

[Attractiveness +1]

…

[A day of cultivation with zero gain.]

[Understanding +1]

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.

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.