Have you ever seen a Japanese couple enjoying a topless resort?

Karen and Kinji have been married for two years.
Karen invites her husband to a foreign topless resort at the end of a year.
She wants to have more fierce sex with him by showing her topless body wearing only a bikini-bottom!
The resort was the best place for such a purpose.
It is because this resort is, unlike normal ones...
You can have sex in public!
This is the fourth work of Topless Club.
TPLS created the original plan and wrote the scenario, while とうの drew the manga.