Shion Hagino is a 29-year-old beauty consultant. Although she has never had a boyfriend, Shion leads a happy and fulfilling life. However, one day, Shion attends a blind date party, which triggers a memory of being rejected by her first love in high school, who told her, "If you want to confess, you should at least do something about your appearance." As if drawn back by her past trauma, Shion somehow manages to time travel and becomes a 17-year-old high school student again. Using the makeup techniques she has perfected, Shion decides to head towards a different timeline from what happened 12 years ago.