Just watched Mouse (2021), whats next?

Mouse was. great with producing a very dark and sinister atmosphere.

So for korean productions:
Flower of Evil - I think you will like this a lot. Defo give it a try first ;)
Save me
Nobody Knows
King of Pigs 
Signal

Chinese/Taiwanese dramas:
Trinity of Shadows
Bad Kids
Burning Ice
Burning River
Day and Night 
The victim's Game
a murderious Affair in the Horizon Tower - this one is more on the crime/investigation part and here is the special key to stick with the story. It starts out like any other story but then it hits and hits and hits

K-drama

• Through the Darkness
• Life on Mars
• The King of Pigs
• Chimera
• Inspector Koo

C-Drama

• Be Reborn
• Under the Skin
• Day Breaker
• Burning Ice

J-Drama

• Ame ni Kieta Himawari
• Gannibal
• Sherlock: The Untold Stories
• Giver Taker