My wife and I live in Japan and we never went to an onsen before, but she decided we could go to a ryokan for a Christmas gift for me. After some research we picked one that had separate baths (there were some nearby with mixed bathing) and also a paid private bath. Well, the trip finally came.
First, onsens are wonderful, highly recommend. But we got a reservation for the private onsen at 9 pm. We went in and took off our clothes and showered and everything. When we got in, it was super relaxing and intimate. We talked for a while, then started making out, a lot. Her tits floated in the water in a very sexy way and we kept getting more and more into it, grabbing all over each other and making out. I sucked and licked all over her breasts and we were getting really into it, every time we stopped to breathe pulling closer in the tub till my duck was grinding against her pussy. Finally I told her to sit up on the ledge of the tub and ate her out till she finished. Soon after, I stood up, leaned her back against the wall, and put it in. And pounded for probably 6 minutes. It was so warm in the room and the bath and her soaking pussy. I’m not sure if we could be heard. I tried to have her keep it down but she couldn’t hold in the moans, and I think we were fine, but there’s a 50/50 chance the other side of the wall was either the pump and filtration system or the women’s onsen. I’m not positive which. Anyway, I finished in her, then we washed off again and finished our time. It was amazing. Highly recommend.
EDIT: If you think this is fake I have proof