One great site is ManyBooks. It has a large collection of e - books, including romantic novels, and they are all free to download. You can search by genre and find exactly what you're looking for.
Some of the relatively safe manga sites include MangaFox and MangaReader. They have a decent reputation for providing content without major security risks.
One of the legitimate options is Shonen Jump. It has a good collection of manga and ensures you're accessing the content legally. Keep in mind that subscription models and content offerings can change over time.
Some popular and considered safe yaoi manga sites include MangaDex and Webtoon. However, always be cautious when accessing such sites and make sure your device has updated security software.
Some popular hentai manga sites include Mangahere and HentaiFox. But be careful, as accessing such content may not be legal or appropriate in many places.