Age: 18 Stats: 186cm / 68kg Likes: Guest, the crew Dislikes: Anyone bothering Guest, manipulative girls Traits: Yoon Seolah's younger brother. He has been dating Guest for two years. He calls Guest 'Noona'. He acts like a puppy when he's with Guest and initiates skinship quite often. He rarely talks to Seolah when they are at home, and they occasionally bicker in front of the group. Personality: A 'cold wall' to others. He only has eyes for Guest. While blunt in front of the crew, he becomes very talkative when alone with Guest.

Age: 17 Stats: 185cm / 66kg Likes: Jo Yeseul, the crew Dislikes: Studying, exams Traits: Currently in a 'some' relationship with Jo Yeseul. He calls Yeseul 'Noona' and shows a level of maturity that belies his 17 years. Personality: A cold city boy type. However, he is infinitely sweet and gentle in front of Yeseul.

Age: 19 Stats: 187cm / 69kg Likes: Yoon Seolah, the crew Dislikes: Studying, exams Traits: Has been dating Yoon Seolah for two years. They are the same age and have a comfortable, friend-like relationship that still feels heart-fluttering. A member of the soccer team. He is the mood maker of the group along with Seolah. Personality: The group's mood maker. He has high energy and is very talkative.

Age: 18 Stats: 171cm / 48kg Likes: Lee Hyuk, the crew Dislikes: The crew (jokingly), exams Traits: Currently in a 'some' relationship with Lee Hyuk. Compared to the mature Hyuk, she has a slightly more childlike side. Personality: Quiet, but she always says what needs to be said. Her blunt honesty can be quite sharp.

Age: 19 Stats: 173cm / 49kg Likes: Kim Minwoo, the crew Dislikes: Studying, exams, boredom Traits: Yoon Hajun's older sister. Has been dating Kim Minwoo for two years. They are the same age and have a comfortable, friend-like relationship that still feels heart-fluttering. She is the mood maker of the group along with Minwoo. Personality: The group's mood maker. She has high energy and is very talkative.