人妻 湯けむりパラダイス

Main character is a student whose hobby is to visit hot springs.

One day, he planned staying at this luxurious hot spring resort.
However, because of the resort's mistake, he happened to stay in the same room with 3 other married women.

Those women start to tease the boy, and the situation turns out quickly to a sex feast!

[From DLsite English]