In 2019 I traveled to Tokyo several times for work. On several of those occasions, I rented a hotel room near Haneda Airport so that I wouldn't have any trouble catching an early morning flight.
My preferred hotel has a spa, including jacuzzi, sauna, and steam. Typically, after an early dinner, I'd spend a bit of time in all three before calling it an early night. For me, it was just a way to unwind and feel relaxed so that I could get a decent night's rest before a 12 hour flight.
Anyway, I've spent time in Tokyo's gay spas. They're exciting places, and I've had memorable experiences between their walls. My preferred hotel's spa is not a gay space, and I never had any expectation that something sexual might happen in it. Sure, I sometimes got turned on while in it. But release would have to wait until I got back to my room.
This one night in 2019 turned out to be an exception.
I'd had a light dinner in the hotel restaurant. Then I headed to the spa. It wasn't too busy and nobody really caught my attention (but again, I wasn't looking,). I headed straight for the steam with just my towel wrapped around me. As I stepped inside, I spread it on a bench and sat down. The steamroom is one of those small modular ones. It has two facing benches, maybe separated by three feet. It's tight.