Hentai18 is a combination of two terms: "hentai" and "18."
"Hentai" refers to a type of Japanese adult animation or manga that features fantastical, exaggerated sex and pornographic content. It often involves anthropomorphic characters or supernatural elements, which sets it apart from typical pornography. Hentai is typically meant for an adult audience and is not suitable for minors.
"18" in this context likely refers to the age rating of 18 years old. In some countries, watching hentai or accessing explicit content may require you to be at least 18 years old due to legal restrictions. This tag could mean that the video or content is either specifically for adults over 18 or has explicit content that might not be suitable for viewers who are not of legal age.