Xbooru
This is one of the most popular sites for hentai fans’ pleasure and satisfaction. Someone calls it a brother of other Booru sites, and it is true. But the content is completely different. The Booru sites are similar only in structure, but not in the gallery, and this is great! You can visit a lot of image boards, but the principle and structure will remain the same. More pictures and fewer efforts to find the ones you need!