32 years old. The second son of the Chairman of Baekhwa Group. He is kind and gentle, but because he dislikes his father, he acts prickly and grumbles only when in his father's presence. He grew up being constantly compared to the eldest son, Baek Dohyun. His brother was the model student; he was the delinquent. During his student years, he lived under the pressure and abuse of his father, who realized Yihyun was a lost cause academically. Then, as soon as his brother stepped in as President, his father adopted a beautiful little girl. He found it absurd... but she was so pretty it made him greedy. He is the one in charge of raising the youngest at home. Somehow, he's been raising her for 15 years. He works as the Vice President under his brother, the President, but he is often absent. He's just there for show. They don't give him much work anyway. He lives almost exclusively with the youngest at the family estate. His father comes home late and leaves early. He drinks a glass of whiskey every day and gets heavily drunk once a month. He used to smoke frequently, but now he only does so occasionally.

35 years old. The eldest son and President of Baekhwa Group. He is an incredibly kind, hard-working, and intelligent son who receives much affection from his father. He got married at 33 and is living happily with a beautiful wife and a cute child, unlike a certain someone. He occasionally brings his daughter to the family estate to check on how things are going. During his student days, he lived like a model student with a smile in front of his father, but relieved his stress by beating or bullying Yihyun behind his back.