History YMMV / ISawTheDevil

** [[spoiler: It could be argued Soo-hyun crossed it even earlier by purposefully allowing Kyung-chul to commit crimes just so he could keep toying with him psychologically, at the expense of other people's trauma and eventually even their lives.]]

* CompleteMonster: [[BigBad Jang Kyung-chul]] is a truly despicable, depraved, and downright evil man; a vicious killer and [[SerialRapist rapist]] of women, [[WouldHurtAChild age not mattering]], with a penchant for [[OffWithHisHead decapitations]], Jang has claimed close to a dozen victims over his prolific career, always keeping articles of their clothing as trophies. Kicking off the film by brutally murdering a young woman named Joo-yun, even after she begged for the life of her unborn baby, Jang later kidnaps and attempts to rape a teen schoolgirl, before attempting the same on a nurse at a hospital. When Soo-hyun, the fiancee of Joo-yun, begins stalking and assaulting Jang as revenge for his fiancée's death, Jang takes up residence in his cannibal friend's home, uncaring for his eating habits, and even rapes the man's wife when he leaves the room. After escaping Soo-hyun once again, Jang attempts to murder a pharmacist, pounds a man with a steel pipe to steal his car, then brutally beats the elderly father-in-law of Soo-hyun half to death before kidnapping, raping, and murdering the man's other daughter, [[KickTheDog all solely to torment Soo-hyun]]. In the end, Jang mocks Soo-hyun for expecting him to apologize, and happily taunts him about the fact that Joo-yun was pregnant before he gutted her. Always complaining that others are [[MoralMyopia "assholes" or "idiots" for not cowing to his every whim]], [[{{Jerkass}} Jang Kyung-chul]] was an impulsive {{sadist}} who gleefully took advantage of any opportunity to torment or murder.

* {{Squick}}: Kyung-chul [[spoiler:fishing his tracker out of his own diarrhea, and shoving it down another man's throat shortly after (he rinsed it, but still)]].

* MoralEventHorizon: Crossed by Kyung-Chul well before the movie starts. [[spoiler: Soo-Hyun himself]] arguably crosses this when [[spoiler: he makes sure that Kyung-Chul dies horribly in front of his family, including his young son, who were completely innocent, estranged from Kyung-Chul and unaware of of his actions.]]
* {{Squick}}: Soo-hyun sifting through Kyung-Chul's diarrhea for his tracker.

* MoralEventHorizon: Crossed by Kyung-Chul well before the movie starts. [[spoiler: Soo-Hyun himself]] arguably crosses this when [[spoiler: he makes sure that Kyung-Chul dies horribly in front of his family, including his young son, who were completely innocent, estranged from Kyung-Chul and unaware of of his actions.]]

* CompleteMonster: [[BigBad Jang Kyung-chul]] is a truly despicable, depraved, and downright evil man who stands out as one of the most wicked {{serial killer}}s across all media. A vicious killer and [[SerialRapist rapist]] of women, [[WouldHurtAChild age not mattering]], with a penchant for [[OffWithHisHead decapitations]], Jang has claimed close to a dozen victims over his prolific career, always keeping articles of their clothing as trophies. Kicking off the film by brutally murdering a young woman named Joo-yun, even after she begged for the life of her unborn baby, Jang later kidnaps and attempts to rape a teen schoolgirl, before attempting the same on a nurse at a hospital. When Soo-hyun, the fiancee of Joo-yun, begins stalking and assaulting Jang as revenge for his fiancée's death, Jang takes up residence in his cannibal friend's home, uncaring for his eating habits, and even rapes the man's wife when he leaves the room. After escaping Soo-hyun once again, Jang attempts to murder a pharmacist, pounds a man with a steel pipe to steal his car, then brutally beats the elderly father-in-law of Soo-hyun half to death before kidnapping, raping, and murdering the man's other daughter, [[KickTheDog all solely to torment Soo-hyun]]. In the end, Jang mocks Soo-hyun for expecting him to apologize, and happily taunts him about the fact that Joo-yun was pregnant before he gutted her. Always complaining that others are [[MoralMyopia "assholes" or "idiots" for not cowing to his every whim]], [[{{Jerkass}} Jang Kyung-chul]] was an impulsive {{sadist}} who gleefully took advantage of any opportunity to torment or murder.

* CompleteMonster: [[BigBad Jang Kyung-chul]] is a truly despicable, depraved, and downright evil man who stands out as one of the most wicked {{serial killer}}s across all media. A vicious killer and [[SerialRapist rapist]] of women, [[WouldHurtAChild age not mattering]], with a penchant for [[OffWithHisHead decapitations]], Jang has claimed close to a dozen victims over his prolific career, always keeping articles of their clothing as trophies. Kicking off the film by brutally murdering a young woman named Joo-yun, even after she begged for the life of her unborn baby, Jang later kidnaps and attempts to rape a teen schoolgirl, before attempting the same on a nurse at a hospital. When Soo-hyun, the fiancee of Joo-yun, begins stalking and assaulting Jang as revenge for his fiancée's death, Jang takes up residence in his cannibal friend's home, uncaring for his eating habits, and even rapes the man's wife when he leaves the room. After escaping Soo-hyun once again, Jang attempts to murder a pharmacist, pounds a man with a steel pipe to steal his car, then brutally beats the elderly father-in-law of Soo-hyun half to death before kidnapping, raping, and murdering the man's other daughter, [[KickTheDog all solely to torment Soo-hyun]]. In the end, Jang mocks Soo-hyun for expecting him to apologize, and happily taunts him about the fact that Joo-yun was pregnant before he gutted her. Always complaining that others are [[MoralMyopia "assholes" or "idiots" for not cowing to his every whim]], [[{{Jerkass}} Jang Kyung-chul]] was an impulsive {{sadist}} who gleefully took advantage of any opporrtunity to torment or murder.

* CompleteMonster: Kyung-Chul is a SerialKiller first seen beating a woman to kidnap her. When she begs for her life, revealing her pregnancy, he guts her anyways without a change in expression.When attacked by her vengeful fiancee and stalked through the film, Jang randomly assaults a nurse and tries to rape her before being stopped before hiding out at the home of two cannibals where he shows no issue in letting humans be slaughtered as his meal. When he turns the tables on the hero, Jang murders the younger sister of the woman he killed at the film's start and takes special delight in mocking the hero over how his fiancee was pregnant before Jang killed her.
* MoralEventHorizon: Crossed by Kyung-Chul well before the movie starts. [[spoiler: Soo-Hyun himself]] arguably crosses this when [[spoiler: he makes sure that Kyung-Chul dies horribly in front of his family, including his young son, who were completely innocent, estranged from Kyung-Chul and unaware of of his actions.]]

* CompleteMonster: Kyung-Chul kidnaps, rapes, and kills young women while relishing every moment of it. One of his least heinous deeds in the movie is gloating to the man who's chasing him that he murdered said man's pregnant fiancée even though she begged for her life.

* NightmareFuel:
** Scenes involving Kyung-Chul have a very good chance of containing this.
** The interlude with the cannibals fulfills this in spades.

* CompleteMonster: Kyung-Chul.
* MoralEventHorizon: Crossed by [[CompleteMonster Kyung-Chul]] well before the movie starts. [[spoiler: Soo-Hyun himself]] arguably crosses this when [[spoiler: he makes sure that Kyung-Chul dies horribly in front of his family, including his young son, who were completely innocent, estranged from Kyung-Chul and unaware of of his actions.]]

* HighOctaneNightmareFuel: Scenes involving Kyung-Chul have a very good chance of containing this.
** The interlude with the cannibals fulfills this in spades.
* MoralEventHorizon: Crossed by [[CompleteMonster Kyung-Chul]] well before the movie starts. [[spoiler: Soo-Hyun himself]] arguably crosses this when [[spoiler: he makes sure that Kyung-Chul dies horribly in front of his family, including his young son, who were completely innocent, estranged from Kyung-Chul and unaware of of his actions.]]

* MoralEventHorizon: Crossed by [[CompleteMonster Kyung-Chul]] well before the movie starts. [[spoiler: Soo-Hyun]] arguably crosses this when [[spoiler: he makes sure that Kyung-Chul dies horribly in front of his family, including his young son, who were completely innocent, estranged from Kyung-Chul and unaware of of his actions.]]