Live sex shows are still a thing in Japan, but not so openly discussed. There was a nightclub in the early 2000's called "DX" in Hachinhoe, that allegedly allowed willing participants to bang a bar girl for free, but it had to be in front of everyone. I never found the place, unfortunately.
I don't know how I feel about creampie sex and prostitutes. Wait was she a prostitute? I didn't see any money change hands. At any rate he should be glad he is in the STD free Hentai Zone.
Well, she HAD condoms lying on the bed. Didn't use them though. I guess it was because he was a virgin she felt safe enough, as for STD's you need to have had sex before to be infected.
I would assume she has had sex before. All joking aside I didn't notice the condoms on the bed, so I guess she was being extra nice for his first time.