As a grocery store salesperson, Yoko-san's busy daily work has already put her under a lot of pressure, and it made her even more bored and depressed when she learned that her husband was cheating on her with another woman. With her patient and enduring personality, she quietly kept this matter secret because she didn't want to ruin her current marriage; only when she got drunk one night with a part-time student co-worker did she reveal her feelings, which made him sympathetic and compassionate. That night, they both went to his house, and he bravely expressed his feelings, saying he had liked her in silence for a long time. Due to her unstable emotional state, she agreed to be intimate with him but on the condition that it would only happen once and that no one else should know. It seemed as though everything had ended there, but in reality, it was just the prelude to the subsequent affairs of these two sexually passionate individuals.