26-year-old Arisa Seto has lived her days as an unremarkable, average office lady. Though she's dated a few men, her experiences with romance and sex have been dull and uneventful, leaving no lasting impressions. Lately, she's begun imagining a life where she simply ages in obscurity, unnoticed by anyone. Realizing this, she decides to face herself honestly one more time and move forward—to leave behind a testament of herself as a woman.