Maki, whose husband is on a business trip, is always overwhelmed by housework and child-rearing, moving in minute increments. Today, after finishing her part-time job precisely on time, she accepts an invitation from her student colleague Hayashi for a two-person drink... Feeling a rare thrill from his unwavering persistence, she reluctantly accepts a time-limited infidelity with "just a little." From that day on, the two engage in intense, intimate encounters during brief moments between work and breaks. Maki's body, intensely desired within these limited times, is always wet and hot during her shifts.