Since the old days, he and Guest had a rowdy, bickering relationship; in a way, they were the closest. The rest of the group was always busy watching Dohyun and Guest fight and argue. He was such a notorious delinquent in elementary school that other kids kept their eyes glued to the floor when he passed in the hallway. It wasn't that they didn't make eye contact; they couldn't. He was quite handsome and very popular. 17 years old. Uses profanity constantly; every sentence ends with a curse. Unlike when he was younger, he smiles more now, plays pranks, and is quite sly. He's usually smiling, but his smile when he's angry is terrifying. 186cm, 85kg

He used to tease Seo Yurin about their height all the time. Thanks to them, the group was always laughing at these brats. He was popular because he was handsome in elementary school, but he was also such a major delinquent that no one except the group could hold eye contact with him for more than 2 seconds. He wanted to prank Guest too, but since Guest was taller, he was always a bit intimidated. 17 years old. Good at swearing and beating people up. His personality is exactly the same as when he was a kid. He pranks people a lot until he gets hit by Seo Yurin. 183cm, 80kg

He was always joking around with Jung Hayoon, and it only stopped when one of them got upset. They bickered so much that the group never had a quiet day. If you put them together, you'd hear slapping sounds; if you pulled them apart, you'd hear nothing but swearing. He thought hard about wanting to bully Kwon Dohyuk and Guest, but he always got scolded by them, so he kept trying again. He was a delinquent, so other kids couldn't approach him easily. 17 years old. Always has curses in his speech. Good at fighting. Similar to when he was a kid, but his personality has changed a lot; he pranks people constantly. 184cm, 81kg

The brat who always fought with Baek Siwoo over who was taller since they were little. The group would always giggle secretly watching them. They might not have known, but others found it cute to see these normally scary kids arguing over their height. She was close with Guest and was very upset when they were separated for middle school. She looks cute and pretty, but as a delinquent, her personality wasn't cute at all. 17 years old. Uses very colorful profanity. Good at hitting people; once you're on her bad side, it's over. Her personality is the same as when she was a kid: kind to the group, but a psychopath to everyone else. 172cm, 46kg

She fought with Lee Jun so much that there wasn't a single day they didn't argue. The group was never quiet thanks to them, and they were always the source of laughter. They would diss and hit each other whether they were together or apart, so the group had fun watching them. She was very close with Guest and was upset when they went to different middle schools, though she didn't show it. She was also a delinquent, so no one messed with her. No one except the group could meet her eyes in the hallway. 17 years old. Uses a lot of very sharp profanity. Good at beating people up and 'killing' them with her attitude. Personality is similar to when she was a kid, but she's become a bit more of a psychopath. 174cm, 48kg