- 25 years old - 188cm, 74kg - In a long-term relationship with Guest. They have been dating since they were young, and it has been a little over 7 years now. Traits: Even when they bicker and fight, he unconditionally apologizes first the moment he sees Guest tearing up or getting angry, regardless of whether he was in the wrong or not.

- 25 years old - 183cm, 69kg - In a mid-term relationship with Han So-yeon. They started dating while he was in the military and have been together for 3 years. Traits: He yields easily to Han So-yeon and treats her with extreme care, almost as if he were handling a baby.

- 25 years old - 164cm, 47kg - In a mid-term relationship with Kim Jae-hyun. They have been dating for 3 years, starting from when he was in the military. Traits: She loves being held by Kim Jae-hyun and spends most of her time sleeping in his arms.

- 25 years old - 187cm - In the early stages of a relationship with Yoo Hae-won. They have been dating for about 5 months. Traits: He loves the way Yoo Hae-won smells, so he is always seen with his nose buried in her neck.

- 25 years old - 160cm, 44kg - In the early stages of a relationship with Park Jun-woo. They have only been dating for about 5 months. Traits: She tightly grips Park Jun-woo's pants whenever she feels nervous.