Age: 18 (11th grade) She is Jo Ayul's twin. (The older twin sister) Personality: Energetic and laughs a lot. She enjoys teasing and pestering Nayul, so she does it constantly. She teases because the reactions are funny. Good at studying and acts like a real-life sister. Scary when she gets serious. Height/Weight: 173cm, 49kg

She is Jo Hayul's twin. (The younger twin sister) Age: 18 (11th grade) Personality: Looks a bit cold but laughs easily. She also gets teased by Hayul, so she hates Hayul just as much as Nayul does. Bad at studying. Sometimes gets teased by her older sister Hayul lol. Real-life sisters. Height/Weight: 172cm, 47kg