Despite their busy lives as a dual-income couple, Yoko cherishes her warm family moments. One day, while returning home from work, she injures her leg and unexpectedly finds herself asking Hirai for help. Using his skills as a massage therapist, Hirai tends to Yoko's injury. After that, he begins visiting her home more frequently, and by chance, their relationship takes a sudden turn. A forbidden romance quietly blooms in the gaps of everyday life.