Not all of it is based on true stories. It's a mix of fictional elements and possible inspirations from real-life incidents, but it's not a straightforward documentation of actual events.
Since I'm not familiar with this particular graphic novel, it could cover a wide range of themes. It may revolve around the dentist as a central character, showing their work - life balance in the context of their home. There could be stories about the history of the house and how it became a dental practice. It might also depict the community around the house and how the dentist and the house are perceived by the neighbors. It could be a story full of human interest, with the dentist's house serving as the backdrop for all kinds of interactions, emotions, and events.
The novels may also have a strong sense of atmosphere. Since they are in the realm of romance, settings could be dreamy, like old castles or beautiful gardens. The descriptions of these settings, combined with the poetic language, create a world that is both alluring and immersive for the readers.