Several years have passed since the death of her husband, and her son has finally become independent. Feeling a bit lonely one day, she is introduced to a dating app by a friend. Despite having no prior knowledge, she decides to give it a try. She meets a 40-year-old man, enjoys their conversations through the screen, and eventually agrees to go on a hot spring trip with him. Natsuko waits nervously at the meeting spot. Suddenly, she hears a voice from behind—turning around, she sees her son standing there. Both are too shocked to speak, but since the trip is already reserved, they decide to treat it as a family outing and head together to the hot spring inn...