The open-air bath at the hot spring inn is undergoing emergency construction! I thought I had no choice but to enter the indoor bath...and then some busty young wives came in, mistaking it for a mixed bath! Surprised by their sudden intrusion, I was surrounded and found in a mixed bathing situation! Everyone has an incredible figure, and they all have impressive big breasts, so I got a massive erection! This is crazy! My erect penis was discovered in a situation where I couldn't get out, and it got even more dangerous! It's super disgusting! Or so I thought, but when the young wives saw my erect penis in front of them, they attacked me instead, and all of them asked for my penis! A divine development!