As a child, Ai Sato (Fuka Koshiba) possessed a beauty and popularity that drew attention. Her first love was Sosuke Hasebe, a boy with a gentle build and a shadowed past, often the target of unkindness. He viewed Ai as a protector, a beacon…

Now employed by the same company, Sosuke remains unaware that Ai was once the object of his affections. Initially, Ai avoids him, but fate repeatedly brings them into contact. She soon notices a hardened edge to Sosuke's personality, a star…

At work, Ai confided in her colleague, Takuya Higuchi (Eiji Akaso), after he learned of her past with Sosuke. Ai was beginning to understand the significance of her former self to him, and despite herself, found herself drawn into echoes of…