Character (2021)

Both have authors in manga/manhua stories coming alive in one way or another. W the main lead jumps into the manhua.

It wasn't until the end of the movie Character that it hit me how similar it is to the drama series Strangers From Hell. In both the movie and the drama our main leads are a crime writers. Both of them gets gaslighted by the killer/s, convincing them that they are the same as the killer which gives them more and more mental destress as the story progresses. The movie and the drama both have this scenario that the two (the lead and the killer) become one, which causes the lead character to go insane. In both shows the story ends with a shot of the lead character in a hospital bed after the gruesome finale.

The antagonists are both psychopath, and a killer and not just that Daisuke and Fukase are bit alike :)

somewhat similar but different. however, both deal with manga/manhwa drawers, there's twists and turns, suspense and murder. if you liked one, you'll more than likely like the other as well.

They have serial killers and psychopath diary have thriller and mystery also.

The 2 psychopaths in both movie and series are so unique and the story are intense

there both like mystery, and a very interesting plot but somehow they have a similar vibe. As well for that, they both have like not a connection in the movies but a connection with the characters their not the same and they both have the craziest plot twist.

Character involves a male lead who is try to get his dream job, a mangaka.
After walking around finding inspiration for a manga he is currently working on. He comes across a terrible murder scene.

This story is similar to Lumberjack the Monster (2023) as the psychopath involves innocent people into their lives and manipulates or inflicts harm or distress upon them.