as Teenage Seung-yi
as Kang Han-byul
as Seol
as Lee Seol
as Yoon Na-mu
as Yang Soo Jung [Secretary]
as Jung Mi Hye [Se Young's friend]
as Sim Eun-ho
as Kim Joo Hyun [First grader]
as Lee Bo Yun
as Lee Bong Ryun [Young]
as Yoon Sol
