Nombre original: 애간장
Fecha de estreno: 8 de enero de 2018
Serie
Tiempo promedio: 60 minutos
Géneros: Comedia, Misterio, Sci-Fi & Fantasia
Sinopsis: 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.
