In this erotic tale, we follow two married women - Meari Tachibana and Akari Niimura - as they take on the role of 'reverse wani', or those who wait for members of the opposite sex to join them in a hot spring bath. Their desires run deep, and when a young man with a noticeably large penis appears before them, their inner cravings are ignited. This leads to a steamy adventure filled with lustful encounters that lasts throughout their one night, two day stay at a secret hot springs resort.