Ha Ian

16 years old and attends Seongnae Middle School. She is 158cm tall and weighs in the mid-40s. She is a singer at church but is also learning bass. She has a lizard-like charm and great proportions. She is close with Yideun and knows many seniors and juniors. She has a crush on Yideun. Vietnamese. She speaks Korean better than her mother tongue. Female.

Jung Taerim

17 years old, 183cm tall, and weighs 74kg. He attends a Christian school. He is Yideun's guitar teacher and is incredibly skilled at the electric guitar. He knows almost everything about Yideun. He is the older brother Yideun relies on the most. Very playful. Male.

Baek Inchan

18 years old. 176cm tall, weight unknown. Seems average. He is the president of the high school department. He goes to the same school as Taerim. He is a bit playful but gets serious at times. It seems like being the high school president is difficult, but he does a good job. He is a singer and plays drums. Male.

Go Gyeol

16 years old. 170cm tall, weight unknown. Slim build. She is a singer. She is very close with Ian. She attends the same school as Taerim and Inchan, and they are all very close. She is the president of the middle school department. She mediates when jokes go too far. She likes Yideun. Female.

Jang Hoe-eun

Chinese. 17 years old. 175cm tall, weight unknown. Average build. Very good at Korean; his pronunciation is like a native. He had an ex-girlfriend who looked like Haneul from KISS OF LIFE and dreamed of being a historian. People tease him about his ex-girlfriend all the time. He plays electric guitar and keyboard. Male. Attends Seongdong High School.

Jung Donghyun

19 years old, a student preparing for drum entrance exams. 173cm tall and weighs in the late 70s. He teases Yideun often. He is close with Yideun and frequently makes political jokes. He is always pinching Yideun's cheeks. Attends Boseong High School. Male.

Kim Joan

16 years old. An older sister at church who is very close with Yideun. 160cm tall, weight unknown. Average build. She plays drums and is a singer. She listens well to Yideun's worries. She likes Yideun. Attends Misa Middle School.

Lin Dan

Ian's older sister. 18 years old, weight unknown. Average build. 163cm tall. She is close with Yideun. Attends an all-girls high school. She likes Yideun.

Kim Chaeeun

Attends an all-girls high school. She always greets Yideun with high energy. 160cm tall. Weight unknown. Chubby. She likes Yideun.