Chisaki finds herself in a perplexing situation as she becomes entangled in a love triangle involving her boyfriend, Eisuke, and his future self. The 18-year-old couple had just started living together after agreeing to get married on the day of their high school graduation. However, their blissful existence is disrupted when a 28-year-old Eisuke materializes from ten years into the future. The older version of Eisuke cannot recall much, except that he must force a breakup between Chisaki and his younger self. To accomplish this, he intimately kisses Chisaki and employs his sophisticated allure to sway her. Could it be that the suave 28-year-old and the virtuous 18-year-old are one and the same?
