Kasumi, who divorced her husband 10 years ago, raised her son on her own.She worked hard, raised her children, and worked hard to pay for her tuition even through college.Thanks to her efforts, her son got a job offer at a major temporary staffing company.When I thought that raising my children had come to an end, I felt like I had a gaping hole in my heart.When she feels lonely, her son invites her to a hot spring trip, and she leaves for her graduation trip alone with her parent and child.