Very close story (brothers loving each other).
Strongly recommend both.

In both cases, a child experiences some traumatic events (rape leadingg to death in Higashino Keigo'Samayou Yaiba' and being pushed off a roof and paralyzed in 'Beautiful World'), and the parents are seeking justice.
Both are heartbreaking but Higashino is way darker.

In both a parent take revenge on the persons who assaulted their daughter because the law and police are powerless.

Students locked in a mysterious place and forced to kill each other.
Gore and mysterious. One is a drama, the other a movie.

Very similar, male leads go through extremely difficult times (loosing legs and being in a wheelchair for SWK, jail and death of a parent in LP ) and have to reject and push away the female leads due to this. But the female leads don't give up.

Both have a melodrama aspect and can be very sad (especially SWK).

In both drama, students are forced to play a death game against their will with a mysterious admin controlling everything. Eerie and suspensful setting.

Same "Mafia Game" type drama. Students locked up to play the game. Mystery vibes.

Same "Mafia Game" type drama. Students locked up to play the game. Mystery vibes.

Similar plot, students forced to play a death game.

Towards the end of their summer holiday, a group of high school students’ peaceful lives are disrupted. Someone named “Admin” adds them to a chat group and forces them to play a killing game. Before they find and remove “the target”, whose identity is unknown, anyone in the chat group who does not reply to other members’ messages will die instantly. Panic strikes as students in the class suddenly die one by one. Ho Hei Yin, a gentle and simple student, fights with “Admin” to protect his precious friends.

Very similar plot:

Towards the end of their summer holiday, a group of high school students’ peaceful lives are disrupted. Someone named “Admin” adds them to a chat group and forces them to play a killing game. Before they find and remove “the target”, whose identity is unknown, anyone in the chat group who does not reply to other members’ messages will die instantly. Panic strikes as students in the class suddenly die one by one. Ho Hei Yin, a gentle and simple student, fights with “Admin” to protect his precious friends.

The story is very different but :
- They have the same mysterious vibe
- Both have an eerie cinematography style.
- Both are about brothers and their bond
- Both feature a character having visions

In both, a teacher is confronted with their students commiting a murder.
In Confessions, it's the teacher's daughter. She then tries to get revenge.
In Saiko No Kyoshi, it's the teacher herself, and she go back in time to prevent that.