There are few places better than Pururin.io if you want to enjoy thousands of free hentai manga and doujinshi works (self-published), so it's not strange that millions of people visit it each month and take part in discussions on member forums.
There are 33,000+ full releases of hentai manga comics available here, both in color and black and white with good quality and good English translations overall, as well as a few hundred comics in Japanese. Having in mind that the tag page has hundreds of content tags, you can find anything and everything here. For instance, freckles and facesitting, maids and mecha girls, or deepthroat and dick girls. Whatever you choose to read on Pururin, you'll be able to use a nifty reader with keyboard shortcuts, a preview gallery, and a bookmark button. Moreover, there's a download and favorite button, as well as to a way to suggest edits for titles, tags, etc., if you're a registered member.
Despite a few ads, Pururin is clean and has a good layout with good sorting and user features whether you're visiting on mobile devices or your desktop computer. You can filter content in a few different ways, and use the basic and advanced search, as well as a huge list of tags split into things like collection, language, scanlator, uploaders, contents, category, parody, etc. There may even be too many of them for casual browsing, but otherwise, they're great to have. You can also adjust different site and reader preferences, and members can talk through discord or user forums, upload content, list contributions, and contribute themselves in different ways.
Pururin is a clean site with a massive collection of full hentai comics, good sorting options, and user features. You can talk to other members, contribute edits and upload or download content after a simple registration. If you like hentai manga, you should check this place out ASAP.