Mori Nanako and Kaori Ijima met in a university club and formed a deep bond, symbolizing their eternal commitment through a shared fairy tale. After graduating from the same university, they joined the same company and sat side by side, nurturing a pure love untouched by outside interference. However, Kaori was pressured by her parents to marry, breaking their sacred promise. Though they continued working in the same office, they stopped speaking to each other, leaving Nanako consumed by loneliness and pain. Kaori learns of Nanako's suffering through coworkers' gossip, clutching her chest as she trembles with the weight of lost love and the cruel gap between past devotion and present reality.