A couple on a university graduation trip are spotted in a hot spring town. Upon meeting, they are immediately subjected to a "mixed bathing experience"—naked upon first meeting! How long does it take for the couple to ignite their desire after their impromptu bathing session?! SDMU-080

A series of impromptu couple observations! This time, they're conducting a mixed-gender bathing test during a university graduation trip in a hot spring town, meeting naked on their first meeting! Under such unavoidable circumstances, can the average woman possibly resist such a hard-on erection!?