Kanna, who had left her children at her parents' home and come on a hot spring trip with just her husband, encounters two muscular black men participating in a Japanese bodybuilding competition at the inn. Amazing muscles! Her husband feels like a child. As she soaks alone in the outdoor hot spring thinking about this, one of the black men from earlier mistakenly enters. She hurriedly tries to explain in broken English, but the towel around the black man's waist comes undone, and Kanna sees his muscular body and huge penis, her body starts to throb on its own…
