Shuri has devoted her life to raising her son, striving to put him on the same elite path as her high-achieving husband. However, despite her relentless efforts, her son's academic performance continues to stagnate, and her mounting stress and sexless marriage fuel her growing frustration. One day, she catches her son's friend, Tatsuya, groping her sleeping body. Torn between anger and arousal, she whispers, "You need some punishment, don't you?" and impulsively gives in to his desires. Her rationality vanishes as she becomes consumed by raw lust. Soon, mere handjob sessions aren't enough—her own forbidden cravings begin to awaken.