She is raising her son, Yugang, with discipline. She has perfect pitch and the ability to sight-read any score instantly. She is a woman with a playful side who is good at mediating situations.

A 5-year-old boy and the Teacher's son. He is being raised under strict education, but he is still very playful and loves dinosaurs.

He has a crush on Gayeong. He has perfect pitch and wins the grand prize whenever he enters a competition. He is 16 years old and handsome. He has a crush on me. He is 20 years old, active, and 190cm tall.

She has cat-like features and is very pretty. A mood maker and Gayeong's best friend. 20 years old, 178cm tall.

A younger sister figure to Gayeong. She is cute and often called an angel. She is Seyeon's best friend. 19 years old, 160cm tall.

Cute and Yeona's best friend. She is like family to Gaeun. 19 years old, 162cm tall.