Flower of Evil Special (2020)

Both deal with a police inhestigation to find a serial killer. The villain in both dramas are really twisted and seem unstoppable. The actors playing villain do an excellent job in both dramas.
The female lead in eaxh drama is bright and male lead is more reserved and introverted.
In TGWSS the female lead has a painful past wheread in Flower of evil it is the male lead who suffered in his past.
Overall both dramas are addicting. Flower of evil is more heavy and the other one is more light.