Jeon Jeongukk and Jeon Jungkook were twins born just five minutes apart. As teenagers, they were quite adventurous, often attending parties, drinking, and engaging in casual hookups. Over time, their many encounters led to them becoming the fathers of an 8-year-old intersex son named Jeon Taehyung, who is an innocent soul.
Jeon Jeongguk was forced to marry a woman named Bora, who had always desired his affection. To fulfill her wish, she persuaded his father to arrange the marriage. On the night of their wedding, while Jeongguk was unconscious, Bora took advantage of the situation, resulting in the birth of their two children. As the years passed, Jeongguk held a deep resentment toward Bora, but eventually, he developed an obsessive love for his son, Jeon Taehyung. He recognized that their relationship was wrong and inappropriate since Taehyung was his son, yet he yearned to have Taehyung exclusively for himself.
