After her husband was laid off, Minako Kahara began working as a housemaid to support her family. Recently postpartum, her breasts were engorged with milk, yet she continued to work diligently. One day, while cleaning the study, she accidentally spilled her breast milk on the employer's important documents. Witnessing the incident, the employer's son, Ken, scolded her and threatened to replace her unless she let him suck the milk from her breasts. As a result, Minako was forced to provide fresh breast milk to Ken daily. Despite constantly having her milk drained, she struggled to keep up with her demanding chores as a housemaid, enduring physical and emotional exhaustion beyond her limits. The story portrays Minako's inner conflict and the intense emotional turmoil she experiences.