At a hot spring inn, a group of 12 couples on a neighborhood association trip accidentally discovered a challenge to strengthen their marital bonds! The wives were tasked with identifying their own husband's penis among six, and if they succeeded and had sex with him right then and there, they would win 1 million yen! However, all six wives failed to correctly identify their husband's penis, leading to an unexpected internal swapping event at the neighborhood association! Everyone ended up having sex with someone else's husband, resulting in a total of six internal ejaculations!
