Mouse to Suspicious Partner: Serial Killer K-dramas That Will Keep You Hooked

Signal: A mysterious walkie-talkie connects two detectives from different eras. Together, they decide to solve and prevent crimes in their respective periods. Image: IMDb

Flower of Evil: When Detective Cha Ji-Won marries Baek Hee-Sung, they have a daughter. While he seems like a committed family man, they are unaware that he is living in disguise. Image: Flower of Evil

Crash Course in Romance: A woman with a heart of gold navigates the cutthroat world of private education when her daughter tries to join a celebrity math instructor's class. Image: Soompi

Happiness: An apocalyptic thriller that takes place in a time in which infectious diseases have become the new normal. Image: IMDb

Mouse: Jeong Ba-reum, a dedicated police officer, faces a life-altering experience when he comes across a psychopath ravaging the town alongside his partner Go Moo-chi. Image: IMDb