After a painful drinking party with his boss, Ikeda is invited to the department chief's home. Waiting there is the chief's clearly mismatched, sexy big-titted wife, Nao. The party reaches its peak when the chief suddenly passes out drunk, leaving Nao to begin boldly flirting with Ikeda. Caught off guard, Ikeda hesitates at first but quickly succumbs to her aggressive advances. In the heat of the moment, his cock helplessly springs to life, completely exposed and out of control.