Futaba, an office lady working in Marunouchi, has a modest pleasure in life: catching cute younger guys on matching apps and making them fall so deeply in love with her that they can never leave. One day, she goes on an overnight date with Shimeji, a college student who started using the app on a whim after entering a rut with his girlfriend. During the date, she kisses, teases, and pampers him everywhere—from riverbanks and abandoned factories to back alleys—and acts like a total nympho multiple times at the hotel. Her beauty and eroticism are levels above his girlfriend's. "I want to fall for a beautiful older woman like this and have my life completely turned upside down."