Both stories focus on friendship and misunderstandings that put that friendship in jeopardy. One of the friends becomes distant and aloof and behaves poorly while the other tries to keep their friendship alive. School bullying is a heavy theme in both films, as well. Weak Hero Class 1 barely has any romance in it while Night Flight is an LGBTQ film.

-Injustice
-Crimes against humanity
-Abuse of Power
-Corruption

A prison warden does everything he can to tame one of his prisoners whose spirit is unbreakable.

A rivalry between a cruel prison warden and a defiant prisoner.

Prison films about a crazy warden who abuses his power and targets one inmate.

In both films the warden seems to take a particular interest in mistreating one prisoner.

The tone and vibes to these films are totally different but they remind me of each other in terms of the human experimentation aspect, as well as there being a whole special ops team of people trying to track down and kill a genetically modified human-thing. Young-nam Jang is also featured in both films.

While Sea Fog is no where near as gory as Project Wolf Hunting, both these films take place on a boat and involve mass murder and chaos.

Both films take place on a ship where mayhem breaks out and an unsightly monster picks people off one by one.

-Starring Zhang Zi Yi
-Zhang Zi Yi's character plays a noble who shows interest (romantic) in a fierce warrior
-Desert setting
-Amazingly choreographed fighting scenes

Guy seeks revenge against a sadistic dude who bullied him in high school.

Bullies target a female character. School bullies who are sadistic and cruel.