Go Happy Mania

After fifteen years of marriage, Kayoko’s world is upended when her husband, Takahashi, confronts her with an unexpected demand for a divorce. The foundation of their long-term relationship shatters as he confesses that his affections have shifted entirely to another woman. This revelation triggers a profound role reversal between the couple, dismantling the familiar dynamic they had built over more than a decade and leaving Kayoko grappling with a sudden, devastating shift in her domestic life. Unable to accept the abrupt end of her marriage or the existence of this unknown rival, Kayoko refuses to remain a passive participant in her own unraveling story. Driven by a desperate need for answers, she takes matters into her own hands, adopting a disguise to conceal her true identity. Operating under this carefully constructed cover, she begins secretly tailing Takahashi through his daily routine. Her singular goal is to uncover the truth about the mysterious woman who has captured her husband's heart. What follows is a tense pursuit as Kayoko navigates the shadows of her former life, determined to expose the reality behind the affair that threatens to erase fifteen years of shared history.