How to break up well

Do-young, the perfect man, enters Se-jin's lonely life. But the happiness is short-lived, Se-jin is tired of Do-young's treatment who always blames her. When she finally decides to break up with him, she discovers his psychopathic side... Will Se-jin be able to break up with Do-young? "You're the one who made me like this." This is the beginning of a thrilling breakup story.