40-something widow, Tomoko Tanai, recounts her experience of dating a man 15 years her junior, Satoshi, who she meets through an online dating app. She warms to him over the following months – despite feeling somewhat inadequate and finding herself presenting an idealised image of herself – as they continue their weekly dates.
Eventually, Satoshi suggests they move in together, to which Tomoko eagerly accepts. Tomoko makes the down payment on the apartment, but soon after her would-be partner disappears. This leads Tomoko to question the man’s motivations as she turns detective, but it also leads to identity-crisis laden self-evaluation.