After divorcing her husband 10 years ago, Taeko raised Tatsuya single-handedly. She worked hard to avoid causing Tatsuya pity, and Tatsuya lived up to his expectations and got a job at a bread factory after graduating from high school. Tatsuya invited Taeko to a hot spring trip. Because she wanted her to heal her daily fatigue. That day is Taeko's birthday. Tatsuya has prepared a present for Taeko.
