After over 20 years of a sexless marriage, the Nonomiya couple finds their relationship at a breaking point. Mitsuko, the wife, overwhelmed by loneliness, begins an affair with a younger man she met through a dating app. When her husband discovers the truth, he trembles with jealousy and anger, yet starts seeing Mitsuko in a new light. This incident becomes a turning point in their relationship, leading them—awkwardly yet sincerely—onto a path of rekindling genuine love.