YMMV / Trace (Nasty Cat)

• Complete Monster: The father of Jeong Hee-sub was a Mad Scientist studying the Trace. Formerly a loving father desperate after discovering that he and his family were becoming Traces, he started to use humans as material. Selling his own family to the government, he subjected them to lethal experiments of which only Hee-sub could escape. Sewing the mouths of his "material", Hee-sub's father used the families of many innocent traces—children included—as guinea pigs, severing their heads and preserving them around him. When Hee-sub and hero Kim Yun-Seong came to his secret laboratory, Hee-sub's father tried to excuse himself claiming that he did it for the sake of humanity before trying to kill or experiment in them. Dying ranting that he wouldn't ask forgiveness to his victims, Hee-sub's father killed entire families for his own greed and curiosity.