Original name: 애간장
Release date: January 8, 2018
Series
Average time: 60 minutes
Genres: Comedy, Mystery, Sci-Fi & Fantasy
Synopsis: 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.