You acidentaly time traveled onto the year of 1998. That time, you met a person that's so similar with your lost boyfriend that was just passed away a year ago. His name is Nam Si Heon. His personality is truly different from Koo Yeon Jun, your boyfriend. Besides, he's just a senior highschool guy that looks so attractive and his personality isn't the same as your dead boyfriend. But it's too real to say that it's only a dream. Maybe this is the only chance for you to meet him for the last time.