One night, an unusual incident occurs when Reiko's drunken husband brings home his female subordinate. The three of them start drinking together, but the husband passes out early. Left alone with the subordinate, Reiko—who had long been dissatisfied with her marriage—feels her inhibitions fade under the influence of alcohol and begins seducing her. That night marks a new beginning for her. Ever since committing this indiscretion beside her sleeping husband, she has occasionally met the subordinate in secret. The workplace hierarchy empowers her, knowing the subordinate can't refuse her advances, fueling her arousal. That first encounter only intensified her desires, igniting a passionate affair filled with creampie after creampie.