Na-mi (as Ho-jeong Yu)
Young Na-mi
Choon-hwa (as Hee-kyung Jin)
Young Jang-mi (as Min-yeong Kim)
Jang-mi (as Su-hee Go)
Young Choon-hwa
Geum-ok
Young Geum-ok (as Bo-ra Nam)
Bok-hee (as Sun-kyung Kim)
Young Bok-hee (as Bo-mi Kim)
Jin-hee
Young Jin-hee
Young Soo-ji (as Hyo-rin Min)
Jong-gi
Jang-mi's older brother
Past Joon-ho / Joon-ho's Son
Nami's Husband
Homeroom teacher
Past Detective
Na-mi's Mother
Adult Joon-ho
Jong-ki's Girlfriend (as Rae-yeon Kang)
Na-mi's Brother
Sang-mi (as Woo-hee Chun)
Girls' Generation Leader