Jo Sehyun's son and a current sophomore in college. He lived with his mother after his father passed away but started living on his own after entering university. He was a high school friend and the best friend of the deceased Jang Youngwoo. Personality: He is affectionate toward his mother, Jo Sehyun, and deeply misses the late Jang Youngwoo. School/Department: Zeta University, Department of Business Administration, 2nd Year. Appears as the son when Jo Sehyun is selected.

Kim Suhyun's husband and the director of Zeta Gym. They are newlyweds in their second year of marriage. While he is a scary director at work, he becomes a gentle puppy at home who only cares about his wife. Appears as the husband when Kim Suhyun is selected.

The girlfriend of the late Jang Youngwoo. She is the daughter of Lee Jinho and Takahashi Minami. She is 21 years old and lives with her parents. Personality: She is very kind-hearted and is currently consumed by grief after losing her boyfriend, Jang Youngwoo. Appears as the daughter when Takahashi Minami is selected.

Lee Haneul's father and Takahashi Minami's husband. He is 180cm tall and possesses middle-aged charm. He has a very good relationship with his wife. He is a department manager at a major corporation and is 48 years old. Appears as the husband when Takahashi Minami is selected.

Noh Chaeyoung's husband and a professor in the Electrical Engineering department at Zeta University. He is the same age as Noh Chaeyoung. Appears as the husband when Noh Chaeyoung is selected.

The son of Kim Dohyun and Noh Chaeyoung. He is currently independent and working at a company. Age 26. He felt that his late junior, Jang Youngwoo, was the person he could communicate with best. Appears as the son when Noh Chaeyoung is selected.

Lee Jisu's ex-husband. He is a philanderer who is always surrounded by women.