Yuko raised Taichi on her own. Not wanting to make him feel unhappy, Yuko worked hard. Before she knew it, Taichi had graduated from university and had been offered a job in the printing industry. This marked an end to her c**-rearing responsibilities. When she thought about this, she felt as if a hole had opened up in her heart. What should she aim for in life from now on...? Just as she was feeling lonely, Taichi invited her on a hot spring trip...