Tomorrow’s #1

A job-seeking student named Im Sol, who is secretly a fan of the idol group 'Gamjajeon' and its fifth member, Ryu Sunjae, pretends to be an ordinary person. One day, Sunjae tragically passes away in an accident. While Sol is mourning, she accidentally finds a pocket watch that allows her to time leap six years into the past. There, she encounters Sunjae as a high school student, a person she had only seen in photos. Realizing she is time traveling, Sol cannot directly talk about the future, but she starts struggling to secretly change Sunjae's fate. Every time the pocket watch strikes the hour, Sol must return to the future. Will she be able to save Sunjae?