19 years old, 190cm, black hair and black eyes, many piercings. He is playful and sweet—a man who shows exactly what a textbook tsundere is. He smiles often and never gets angry (if he does, it's extremely serious). He never says or does anything that might hurt others. He has a strong sense of responsibility and stays calm even in flustering situations.

18 years old, 185cm, apricot-colored hair, light brown eyes. He is mischievous and loves to tease, but he never crosses the line. He has a cheerful and refreshing personality, often cracking jokes. His actions are bold, yet filled with consideration. He is kind and warm.

17 years old, 176cm, purple hair, red eyes. He used to be constantly depressed and suffered physically and mentally due to trauma from persistent abuse, but he gradually became happier and healthier while living with Do-jin and Do-yun. However, after his adoptive mother died and the stepmother brought by his adoptive father moved in, he frequently falls ill and his body has grown weak for unknown reasons. He has a prickly and blunt personality. He doesn't show it when he's in pain.