There's 'A Court of Thorns and Roses' series. While not exactly a traditional 'human girl marries monster' at first glance, Feyre, the human girl, becomes involved with Rhysand, who has some rather monstrous aspects in his fae form. Their relationship develops in a complex world filled with magic, danger, and political intrigue. The series shows how love can grow between two very different beings.
Typically, they start with the encounter. The human girl stumbles upon the monster, either by accident or some fated event. Then there's a period of fear or mistrust from the girl's side, as she tries to understand the monster. As time passes, she begins to see the good in him. For example, he might save her life or show her kindness. This leads to a growing bond, and eventually, they fall in love and face obstacles together, like society not accepting their relationship or other threats.
Characteristics include the building of unique bonds. The relationships between human males and monster girls are not typical, so they form bonds based on mutual understanding of their differences. For example, a human male might bond with a harpy girl over their shared love of the sky in some novels. There is also a focus on the physical and emotional transformation of the characters. The human male may change his views on love and relationships, and the monster girl may learn about human emotions. This is seen in novels like 'A Centaur's Life' where characters grow and develop through their relationships.
Well, 'Monster Musume: Everyday Life with Monster Girls' is a well - known novel in this genre. It tells the story of a human male living with several monster girls, and all the comical and romantic situations that unfold. There's also 'My Girlfriend is a Mermaid' which is about a human male's relationship with a mermaid girl. And 'Cat Planet Cuties' has some elements of human - alien (which can be considered as a form of'monster' in a sense) girl romance.
One popular one is 'A Shade of Vampire' series which has elements of a human falling in love with a vampire - a type of monster. The relationship between the two characters is filled with passion and danger.
There is a story where a human lives in a forest - fringed village. One day, he encounters a dryad - type monster girl. She is the guardian of the forest. The human accidentally trespasses into a sacred part of the forest. Instead of punishing him, the dryad girl decides to educate him about the importance of the forest. As time passes, the human starts to help her protect the forest from poachers and they develop a bond that is both of friendship and mutual respect.
One interesting human x monster girl story could be about a human adventurer who befriends a mermaid - like monster girl. They meet when the human is exploring a secluded cove and the mermaid girl saves him from a dangerous sea creature. Their friendship grows as they learn about each other's worlds, with the human sharing stories of the land and the mermaid girl showing him the beauty of the underwater world.
I recommend Monster's Best Friend. The main character of this fantasy-mystery fantasy novel was a monster, not a cute beast. Unlike other novels, it was not a friend, but a tool. The main character was cold and selfish. He was a Summoner who pursued eternity. Although a woman appeared, the protagonist did not have any ambiguous thoughts. I hope you like this fairy's recommendation. Muah ~π
I recommend "The Chief Concubine: My Husband Has a Demonic Spirit", a novel about time travel. The female protagonist was tricked into traveling to ancient times. Her identity was a cannon fodder consort, but she later turned the tables. The male lead was a devilish man. The two of them gradually liked each other as they got along. Author's friendly reminder: This article type: Time travel;2. Protagonist's label: 1v1 Female protagonist is a human, male protagonist is a demon, female protagonist's relationship line turtle speed. I hope you like this fairy's recommendation. Muah ~π
Well, it's somewhat popular. Some fans are really into this concept because it's different from the usual Power Rangers story. It gives writers a chance to be creative and show relationships that are not in the mainstream shows. However, not all fans like it as it goes against the typical hero - vs - villain setup that Power Rangers is known for.