Kyota lost his father in an accident when he was young, and has been living alone for a long time.Rinka has come to love Kyota, who she raised with affection, more than her son.Time passed, and Kyota also graduated from university and got a job.However, the place of employment was Kansai.In other words, in the near future, he will be separated from his beloved Kyota.One day, Rinka invited Kyota to a hot spring trip.I'm going to make it my last memory of being alone with Kyota, who is about to leave the nest...