No, this anime is not hentai despite the title. This is a fluffy rom-com that centers on the antics of Yoto Yokodera, the Hentai Prince, Tsukiko Tsutasukakushi, and a trickster god. The trickster god lives in stone cats. When a person wishes on the cat and gives it an offering, the god grants the wish. Only the wish is not granted as expected. The god also gives any personality traits a person wishes gone to someone who needs it. Well, Yoto loses the ability to lie and Azusa loses the ability to show emotions. The pair work together to find the people who gained the traits wished away in order to regain them.
Yoto becomes a larger perv without the ability to lie and filter what he says and does. This leads him to be called the Pervert Prince. Of course, he is absorbed in ecchi, dating sims, and splutters out his views of boobs and more. Most of the comedy centers on misunderstandings and his perversity. Some of the other antics works in other problems the trickster stony cat causes for the people around Yoto and Tsukiko.
Hentai Prince is pretty standard fare. Yoto is a pervert who is a nice guy inside. He eventually develops relationships with the popular golden hair girl, Azusa along with 2 more girls. Tsukiko’s older sister falls for Yoto through his lie of having a younger identical twin. Again, pretty standard harem fare. Expect the usual “oops I walked in while she was taking a shower” scene. There are plenty of flat chest jokes and references to Yoto’s porn collection. Yoto has zero pride or dignity. He often publicly acts as Azusa’s dog because he cannot hide his true feelings.
There isn’t much else to say about this 12 episode run. The animation isn’t stellar. It often deforms for comedic purposes. Yoto is annoying. I find most perverted harem protagonists that way. Each episode had a moment that was amusing. Most of the time I found these scenes inadvertently amusing. Scenes that were not meant to be funny struck me as funny, in other words. Hentai Prince and the Stony Cat is alright for some light laughs.
I wonder if the pervert antics of this genre started with reality and started a feedback loop or if the genre influenced reality first. Judging by the perverse antics we see in American culture, I suspect reality (though at first limited and rare) started the antics found in these comedies. I doubt these types of behaviors are common, however. Some otaku mistake fictional behavior for real behavior. Or make these fictional behaviors real.
I am not a fan of these type of comedies. That was the main reason why I try to watch them. So far, they seem to follow certain patterns and jokes: shower/hot spring scenes, the mistaken up-skirt scene, and other patterns. I am not one to judge this genre of anime. I prefer serious stories. In any case, if you like fluffy lighthearted comedies with cute female characters who don’t tolerate a pervert, Hentai Prince might be one for you to watch. Because of the sexual jokes (there isn’t any real nudity), fan service, and other sexual references this anime is not suitable for everyone’s sensibilities.