At 25, Nanazawa has been secretly in love with her high school senior, Seto-san, for a long time. One day, she suddenly time slips back 10 years! There, she finds Seto-san as a second-year high school student. To date the girl she adored so much, Nanazawa's "do-over life" begins――! Time slip × age gap reversal × yuri erotic comedy, let the show begin!!