A possible plot is an OC who is a chef. He opens a restaurant in the Monster Musume world. Different monster girls come to his restaurant, and he has to learn to cook their favorite foods. Along the way, he meets a particular monster girl who becomes his muse for new recipes, and they fall in love while exploring different cuisines and cultural food traditions.
Another plot could revolve around an OC who is a scientist. He discovers a new type of monster girl that no one has seen before. This discovery causes a stir in the Monster Musume community. As he tries to study and understand this new creature, he forms a special bond with her, and they face challenges together, like dealing with those who want to use the new discovery for their own gain.
The OC could be an artist who is commissioned to paint portraits of the monster girls. Through this process, he gets to know their personalities and stories. This could lead to him becoming a sort of advocate for them in the human world. Another plot could be that the OC is a delivery person who always delivers to a monster girl - only establishment. He becomes friends with the regulars and gets involved in their community. A different idea is that the OC is a gardener and the monster girls' habitat is being damaged. He uses his skills to restore their environment and in the process, forms a deep bond with them.
One idea could be that Naruto discovers a hidden village of monster girls in the Land of Fire. He has to learn to co - exist with them and maybe even team up with some to face a new threat that targets both humans and monster musume.
One idea could be a crossover with a fantasy adventure series. The Monster Musume characters could join the heroes of that series on a quest to find a magical artifact. For example, they might travel through a dangerous forest filled with new and different monsters. Another plot could involve a crossover with a school - based anime. The Monster Musume girls could attend a normal school and deal with the typical high - school problems like exams and crushes, while also having to hide their monster identities. A third idea is a crossover with a superhero story. The Monster Musume could gain superpowers and team up with the superheroes to fight a powerful villain threatening both their worlds.
In Monster Musume fanfiction, a common plot is the training or development of the monster girls' special abilities. For instance, a mermaid learning to control her water - based powers better. There could also be a plot where a group of monster girls and a human form a detective - like team to solve mysteries in their town. This might involve using their unique monster traits to their advantage. Another plot idea is a love triangle between a human and two monster girls, which creates a lot of drama and tension as they all vie for the human's affection.
Perhaps a story where a group of monster girls and their human friends enter a mysterious forest that has strange magical properties. Inside, they find that their abilities are either enhanced or suppressed in unexpected ways. They must rely on each other's unique skills to find their way out. This would involve a lot of character development as they face different challenges and learn more about themselves and each other.
One idea could be an OC who is a new student at Monster High and has a unique ability that no one else has, like the power to communicate with long - forgotten spirits. This could lead to all sorts of adventures as she tries to fit in while also dealing with the mystery of these spirits.
One idea could be a story where Suu discovers a new form of her ability that she has to learn to control. This could lead to her having to attend a special school for monster girls to master it. Along the way, she makes new friends and they all have to work together to overcome the challenges of this new power. It would be a story of self - discovery and friendship.
A possible plot is that the main character discovers a hidden power within himself that attracts all the monster girls. As the harem forms, they have to deal with the outside world's reactions. The 'double' part could mean there are two main groups of monster girls, perhaps from different regions or species. Regarding the 'lemon' element, it could be about the characters exploring their new - found feelings through soft and passionate embraces. For instance, a cat - girl might purr contentedly when hugged by the main character, leading to a deeper emotional connection.
How about a story where the Monster Musume and Naruto characters accidentally swap bodies? This would lead to a lot of humorous situations as they try to adapt to each other's lives. They would have to figure out how to use their new bodies' abilities and also deal with the reactions of their friends and family. As they struggle to get back to their original bodies, they would learn more about each other's worlds and cultures. This could also be a chance for some of the characters to gain new perspectives and change for the better.
Another idea is an OC who is a transfer student from a very different monster culture. Maybe they come from a far - off land where monsters have different ways of scaring or being funny. This OC could bring in new techniques and ideas, causing a stir among the students and professors. They might struggle with the local monster language at first but then use their own unique language and cultural quirks to their advantage in a big project or competition. For instance, in a scare - off competition, they use a unique call from their home culture that confuses the opponents and gives them an edge.