Mahiro, a former cabaret hostess, starts working as a delivery driver after her husband is laid off, and teams up with veteran driver Nakata. At first, Nakata is put off by Mahiro's cheerful and familiar nature, but he is aroused by her voluptuous body as she works, drenched in sweat, and attacks her... They develop a deep relationship, with each other having sex many times during the course of the job.