Horror

One day aliens come to earth taking humans to their factories to become livestock and food
The humans are treated the way we treat animals so it is an interesting comparison
If you enjoyed The Promised Neverland this has a similar base plot - teens who are going to become food trying to escape and save humanity

A story about a girl who can see ghosts but acts like she can't see them at all
If you are looking for light horror I would recommend this because the author adds humor and sweet moments throughout the plot

The MC was the country's hero but they betrayed him. Now he decides to get revenge on the people who wronged in the more ruthless way possible.
He is an anti-hero that you want to root for, as we follow his story you can see how deep the corruption in the country goes.

Free on Webtoon
She reincarnates into the body of the FL of a strictly romance novel. Even though she follows the story line as closely as possible on the day of the confession the story genre changes and there is a zombie apocalypse
Every time the MC is killed she goes back in time to the morning of.

1st part of the series
The MC wakes up in the 'werewolf game' where she and other players are given the roles of werewolves and villagers. It is basically an intense among us death game minus the daily tasks

2nd part of the Jinrou Game series

Technically the 3rd story of the Jinrou Game series
This one has a new MC so it can be read as stand alone or with the others. Because people are used to the previous MC's personality this one isn't as well liked

A high school girl is about to commit suicide when she witnesses a murder. She decides to work together with the murderer to get her revenge.
Note: This series has not been updated in a long time and is assumed to be dropped. From what I have gathered the author one day disappeared from social media quite a few years back

Same creators as Bastard but I personally prefer this story
The MC's family died in an accident and he moved out of his house into an apartment complex.
People begin to get infected and change into monsters triggering the apocalypse. Can the MC and the other tenants survive?

Police man who takes 'justice' into his own hands.
The MC is a wolf in sheep's clothing at work he seems like a nice hardworking guy with a few quirks. But he mercilessly and ruthlessly kills people who he believes are beyond the law.