After five years working at a stationery manufacturer, Mahiro Ichiki finds herself struggling amid worsening company conditions and rumors of acquisition. Coming from a single-parent household, she grapples with her desire to get married and her own conflicting emotions. Even after accepting her boyfriend's marriage proposal, she cannot bring herself to take that final step. One evening, while working late, her coworker and former classmate Atsushi unexpectedly returns to the office. Recalling memories from their early days at the company, the two share drinks and open up to each other. As past and present intertwine, a new emotion begins to stir between them.