Plot
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.
Cast
Lee Jung-shin
as Kang Shin-Woo
Seo Ji-hoon
as Young Kang Shin-Woo
Lee Yul-eum
as Han Ji-Soo
Lee Tae-seon
as Shin Joo-Hwan
Cho Lee-hyeon
as Baek Na-Hee
Min Do-hee
as Jang So-Ra
Lee Joo-hyung
as Choo Geun-Deok
Kim Sun-young
as Shin-Woo's mother
Park Han-sol
as Kim Yun-jeong
Go Gyu-pil
as Mozart student's Head Teacher