Wakaba, a college girl who longs for the青春 (seishun, or youthful days), decides to make her “college debut.” On Halloween at age 20, she goes out in a school uniform costume, and by chance ends up going on a date with a high school boy named Ikuto! “If I were a high schooler too… Would we have had a future together like this?” Though she thought it would be just a one-day date, due to “certain circumstances,” the two begin re-living青春 together!? Taking on all those classic youthful situations together— A fake high schooler’s second-chance, uniformed love story!