Yuna Hayashi, a happily married woman, shares a seemingly perfect life with her husband, envied by all who know them. However, their world is shattered when their reclusive NEET neighbor suddenly gains mind-control abilities and sets his sights on Yuna. Gradually succumbing to his power, Yuna eventually experiences the ultimate betrayal—having sex with the NEET right in front of her husband—and awakens to an overwhelming new pleasure. Swearing loyalty to the NEET next door, Yuna's devotion shifts as the couple's happiness twists into dependency on him. For her, this transformation marks the beginning of an intoxicating new era of desire.