Sumire desperately raised Kota as a single mother. Thanks to his desperate efforts to raise him, Kota successfully graduated from university and got a job. When Kota started living alone, Sumire looked back on her life. I'm happy that Kota left the nest fine, but what about my life? One day she was invited to a hot spring trip by Kota. Sumire, who is worried about her own life, and Kota, who is optimistic and doesn't care about her own father, start a hot spring trip.
