Immediately after Masaaki was born, his father evaporated, and Reiko raised Masaaki with just one woman. Seeing her mother working hard for her son, she also had a strong gratitude. It swelled day by day, and Masaaki began to see Reiko as a woman. On the other hand, Reiko also had a feeling of emptiness that left a gap in her mind when Masaaki graduated from college. It was due to the loneliness of losing a loved one. The two were in love with each other.