Night has Come is about a innocent kids game that turns deadly and where a bunch of kids have to survive and figure out the mystery behind the game. If Wishes Could Kill is also about a highschool group trying to survive against a cursed phone app.
Married Couple where 1 partner has a secret past/alternate life. While in Flower of Evil, it is the husband who has a dark past and who might be a killer. In Married Woman Killer, it is the wife who has trhe secret life as a killer. In Flower of Evil, the wife is a cop and now has the job to investigate the secret life of her husband who she does not know has this secret life. In Married Woman Killer, the husband is a reporter and is given the job to investigate this killer who is his wife who has this secret life/job that he does not know about.
Male lead's parent is a serial killer. The male lead is now a cop due to his parent being a serial killer just like the male lead in this Kdrama. The difference is it is the father in come and hug me and in Queen Mantis it is the male lead's mother who is the serial killer.
