Haruka had a secret her husband must never discover. Her relationship with him had grown increasingly cold due to his demanding work schedule, and sexless nights had become routine. Seeking relief from the mounting stress, she began a forbidden affair with her brother-in-law. At first, she thought it would be just a temporary escape, but he kept finding excuses to visit whenever her husband was away, relentlessly pursuing her body. Though Haruka initially resisted, after repeated encounters, the intense pleasure became addictive, and she found herself unable to let go.