Both main characters kill people in the name of justice believing they are righteous, and are in a cat & mouse chase with detectives. Vigilante has more action but death note has more of the detective work.

These two stories share so many similarities you could argue Connect is very inspired by Ajin. They both feature a "new species of human" that are immortal, and constantly regenerate wounds no matter how big, and the main characters are constantly treated like absolute shit and running away from the many people after them. The only difference is I'd say the "Ajins" of Connect are instead just the body of the person instead of a new entity.

Revenge of others is pretty much the high school version of King of Pigs. There's a mystery of a character's death in each show, and the main character is trying to get revenge for what happened. One of the characters in revenge of others takes on a punisher type role, just like the main character in king of pigs.

Both are dramas set a lot in highschool and have a very similar feel to them. The main characters start to get involved with criminals and become a target, and they fight very brutally unlike most kdramas.

Both dramas have brutally realistic school violence and bullying, and main characters that take it upon themselves to go against others no matter the means.

The two main characters of weak hero are also both especially similar to one of the characters in king of pigs.

Although cancelled, Joseon Exorcist and Kingdom: Ashin of the North feel very similar. They both have zombie beings hunting humans, and a dark historical atmosphere set in the Joseon period. They're both of similar length too, and while Joseon exorcist was unfortunately cut short, it can still be watched as a "what if" 2 hour long special.

Both are darker dramas with psychopaths and aren't afraid to show very violent scenes. They have a lot of focus on mental health and the slow downfall of the characters as they deteriorate mentally and start to go insane.

Both dramas are about psychopathic serial killers and the police chasing them down while discovering a lot about their childhood and finding out the relations with their past.

While the plot is very different, they both have very raw violence and the stories are told in a very realistic way. They are both social commentary on various subjects, and you can tell they were written by the same person (original animated movies).

Both shows are about high school students working a criminal life in order to make money, with a second student realising what's happening and joining the other.

Both dramas are set in historical times, Joseon Exorcist being joseon and Bulgasal being both Goryeo and Joseon. Zombie like monsters are in both dramas, and they attack people in violent ways with super strength. They're more like demons, and there are specific demons that can turn other people into the mindless creatures to attack their own. Both are very violent and have good battle scenes.

Both are zombie dramas with ongoing storylines (multiple seasons)

Kingdom is better in every way, but kimi to sekai is still pretty good if you want something like it.