I was looking forward to enjoying a hot spring trip, but my husband fell ill, so I ended up taking his place for the reserved massage. The therapist's touch felt strangely lewd, and gradually my body began to heat up. Before I realized it, oil covered my entire body, and a stranger's finger had deeply penetrated my pussy. With my husband sleeping right beside me, I was forced into a situation where I couldn't make a sound no matter how intense the pleasure grew. An ultimate experience of silently writhing in climax awaits.