Graduation trip with female college students for hot spring mixed bath and sex! HUNTA-046

When I arrived at the hot spring inn, I discovered that due to a mistake in their homework, I had to share a room with a group of female students on their graduation trip. Because there were so many of them, I didn't dare to complain and went to soak in the hot spring by myself. However, all the female students barged in! I tried to leave but was discovered to be already erect! I was then taken advantage of by the leering female students...