As a grocery store employee, the busy daily work has put a lot of pressure on Yoko-san, making her even more bored and depressed when she found out that her husband was having an affair with another woman. With her patient and enduring nature, she silently kept this secret because she didn't want to break the current marital relationship, until one night when she confessed her feelings to a part-time college student while drunk, and he sympathized and pitied her. That night, they both went to his place, and he bravely expressed his long-time secret affection for her. Due to her unstable emotions, she agreed to be intimate with him, but only once and under the condition that no one would know. It seemed like everything stopped there, but it was actually just the beginning of the secret affairs between these two passionate individuals.