「結婚するまでお互いに貞操を守ろうね」と常々話していた友達同士の男女が初めて2人きりの混浴露天風呂に入ったら友情よりも性欲が勝ってしまうのか？
When the men and women of friends who used to talk to each other, "Let's protect each other's chastity until they get married," will their libido win over friendship when they enter the mixed-bath open-air bath with only two people for the first time?
