My beautiful aunt Chitose, married and living in the Kansai region, comes to stay at her nephew Kazuya's apartment to attend her wedding ceremony. With Chitose—gorgeous and stunningly slender—all alone with him, Kazuya feels his manhood throbbing with desire. His mind constantly fills with lewd fantasies about her. That night, Chitose returns home drunk and disoriented from the wedding reception, and as Kazuya gently tends to her, he can no longer restrain himself... The story unfolds as their forbidden relationship grows ever deeper.