At an exclusive all-girls school, the narrative revolves around the bond between childhood friends Shinobu Handa and Momoko Naitou. Shinobu harbors a deep-seated affection for Momoko since their initial encounter, a sentiment unchanged by time. While navigating the complexities of high school life, Momoko seems to have let go of their shared history, unlike Shinobu who clings to their past promise in the hope that Momoko will recall their cherished bond.