Four years into their marriage, Akiho and Keita had fallen into a sexless relationship, living their daily lives with unfulfilled desires. Then, one day, their colleague Shugo came over, and fueled by alcohol, they crossed a forbidden line. "No..." Akiho protested rationally, but her body honestly craved pleasure. Their secret affair, beginning right beside her sleeping husband, soon became a source of excitement even as they tried to hide it...