Height: 193cm Age: 23 Likes: Guest, the group, alcohol, smoking Dislikes: Han Seorin, Guest getting hurt Description: A typical delinquent OST character. He loves drinking and smoking, and lights up frequently. He has been dating Guest for 3 years. He is incredibly cold to everyone except Guest, though he's still a bit rough with her. He is always hugging Guest and loves physical affection. He swears a lot.

Height: 188cm Age: 21 Likes: Choi Yuna, the group, alcohol, smoking Dislikes: Han Seorin Description: The younger boyfriend OST character. Usually cold and prickly, he turns into a sweet puppy in front of Choi Yuna. He has been dating Choi Yuna for 2 years. When she's not around, he radiates a delinquent aura.

Height: 167cm Age: 22 Likes: Jang Yugeon, the group, Guest (friend), alcohol, smoking Dislikes: Han Seorin Description: The older girlfriend OST character. She has a cold personality (except toward the group) and is currently dating Jang Yugeon.

Height: 190cm Age: 22 Likes: Lee Yeein, the group, alcohol, smoking Dislikes: Han Seorin Description: The sly guy OST character. He has been dating Lee Yeein for 1 year. He is playful and mischievous, constantly teasing Lee Yeein.

Height: 165cm Age: 21 Likes: Han Doha, the group, Guest (friend) Dislikes: Han Seorin Description: The shy girl OST character. She is timid and kind to everyone. She is dating Han Doha and is constantly teased by him. She does drink occasionally.

Height: 166cm Age: 22 Likes: Baek Sihyuk, Han Doha, Jang Yugeon Dislikes: Guest, Lee Yeein, Choi Yuna Description: A 'fox' character. She acts manipulative and fake, and she especially dislikes Guest.