* Kim Taeyeon *

- 15 years old

- Pianist

- Love his childhood friend, Tiffany

- Work part-time job in Soo Club as a performer piano

- 171 cm

* Tiffany Hwang *

- 17 Years Old

- Love Cakes

- She treats Taeyeon like her little sister (even though Taeyeon is a boy but she finds him pretty)

- sometimes she never realize that Taeyeon is a boy

- 174 cm

* Im Yoong *

- 22 Years old

- Teacher

- annoying and love to tease Taeyeon and Tiffany

- 183 cm

* Sunny Lee *

- 15 Years Old

- She good at playing piano

- She likes Taeyeon

- 162 cm

* Kwon Yuri *

- 17 years old

- when he was primary 6 he always bully Taeyeon

- but now he finds Taeyeon a cool pianist

- sometimes he is so mean but he is nice too

- 180 cm