Kang Shin-Woo is a math teacher with a good looking appearance. He has not forgotten his first love Han Ji-Soo for the past 10 years. By an accident, he travels to the past when he was a high school student. There, he meets his younger self. Kang Shin-Woo struggles to make the younger Kang Shin-Woo's love come true.
as Kang Shin-Woo
as Young Kang Shin-Woo
as Han Ji-Soo
as Shin Joo-Hwan
as Baek Na-Hee
as Jang So-Ra
as Choo Geun-Deok
as Shin-Woo's mother
as Kim Yun-jeong
as Mozart student's Head Teacher
as Kim Min Seok
