Don't forget, this is Kingdom we're talking about.
Yeah, this is true. Most notably their Empress label, but they're known to have gone further the line even with their now defunct Bambini label, which was supposedly U-15 only. But I really have always enjoyed titles under the Bambini and Princess labels.
However, something just doesn't let me enjoy full nudity. I have a huge thing for lingerie and certain types of clothing, so I guess that when they're completely taken off, it's kind of boring and the element of mystery is gone. This is why the edge of nudity with small clothing and underwear is that much more appealing to me; most productions like those of Clubteen's and Mare are right up my alley. I would have loved to see Natsumi working with them, for example.
I can understand why the style of this video pleases other guys, though. The pee thing for example is usually seen as a moment of complete intimacy, so a lot of people actually do get turned on by that. I don't know, it just doesn't do it for me. But to echo the wise words above of
@nicetomeetyou, "hopefully IV variety is huge enough to satisfy any of us pervs". Indeed!