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.
One common theme could be the exploration of their relationship dynamics. It might involve how they interact, whether it's in a friendly way or with some underlying tension.
Well, 'Persepolis' by Marjane Satrapi is among the melhores graphic novels. It's an autobiographical work that gives a personal view of growing up in Iran during the Islamic Revolution. 'Fun Home' by Alison Bechdel is also notable. It combines family history, coming - out story, and literary references in a really interesting graphic novel format.
For a great manga reading experience, you could try Viz Media or Comixology. They have licensed content and reliable servers. But remember, always respect copyright and choose legal platforms.