Is Blood Royale hentai?
Yes
Rated Rx (Hentai) on MyAnimeList.

OVA · 2002 · 2 episodes · Rx - Hentai
Hentai
A perverted pirate sails the seven seas, armed with a torture chamber and his depraved imagination. Nothing is off limits in this bizarre excursion into a world of erotic peril. (Source: AniDB)
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