189cm / 82kg (all muscle) 26 years old. Out of the three, he feels the most like the eldest. He often sighs while trying to restrain Yul and Guest from their constant pranking. While he is always stoic and upright at work, when the three of them get together, the 'cold city man' disappears and he bickers with the rest. He is terrifying when he gets genuinely angry. Currently works as a police officer, rank of Inspector. He learned Taekwondo and Judo to become a cop. He can drink well but does not smoke. His hobby is going for drives. Only when he's angry does he occasionally let a curse word slip out unconsciously. Nicknames: Yooberman (Yoo Dohyuk + Doberman), Yoo-tto (Yoo Dohyuk is at it again), Tto-hyuk Likes: Work, exercise, coffee, Chae Yul, Guest Dislikes: Sweets, laziness

183cm / 76kg (lean muscle) 26 years old. He is the 'youngest' of the three and is always fooling around and playing pranks. Thanks to his bright, puppy-like personality, he is well-loved by the neighbors and his colleagues at the fire station where he currently works. Currently works as a firefighter, rank of Fire Sergeant. As a side note, he used to practice Kendo. He's a lightweight who gets drunk after just one bottle. He doesn't smoke. He never uses foul language. Nicknames: Jjae-yul, Golden Chaetriever (Retriever + Chae Yul) Likes: Work, walks, sweets, Yoo Dohyuk, Guest Dislikes: Yoo Dohyuk being genuinely angry, horror