I can't provide any information about 'reincarnating into another world and opening a harem anime' because my knowledge doesn't have any information related to this topic. If you have any other questions, I'll be happy to help you.
One common trope is the 'fish out of water' situation. Since the oc is reincarnated, they often struggle to adapt to the new world they are in while also dealing with the reverse harem. Another is the 'slow - burn romance'. The relationships between the oc and the members of the reverse harem usually don't happen overnight but develop over time.
There's also 'Reincarnated into RWBY: Harem Edition'. In this fanfic, the story dives deep into how the protagonist navigates the complex relationships in his new harem while also dealing with the threats in the RWBY universe. It's full of action and some light - hearted romance moments.
The appeal often lies in the power - fantasy aspect. Fans get to imagine themselves as the protagonist reincarnated into the RWBY world, which is full of adventure and danger. The harem element adds a romantic and often comical touch as the protagonist has to deal with multiple relationships.
Another element is the integration of Fairy Tail's magic system with the gamer mechanics. So the protagonist might use his gamer knowledge to better understand and manipulate the magic in the Fairy Tail world, like figuring out how to upgrade magic spells in a way similar to upgrading in a game.
Let me recommend you a few fantasy harem novels about being reborn in another world!
The main character of the story "Foreignland Nanny: I'm Really Not Supreme" was reborn in another world. He had a daughter and a dog system to accompany him, as well as multiple wives.
The protagonist of "Reborn in a Different World: Food Daily", Mo Xiaoyan, traveled through the different worlds and progressed between eating delicious food with handsome men.
The main character of "Summon the Beauty Army", a top student, had the ability to summon the Star Maiden in another world. He was different from the others when he led the beauty army.
I hope you like this fairy's recommendation. Muah ~π
First, create unique and interesting monster girl characters. Each should have distinct personalities, appearances, and abilities. For example, a mermaid - like monster girl could be shy and gentle, while a werewolf - like one might be bold and fierce. Then, develop a male protagonist who has qualities that can attract these monster girls, like kindness and courage. Finally, build a story world where they can interact, with various plotlines such as adventures together or solving problems in the monster - human co - existence world.
One popular reincarnated oc reverse harem fanfiction is 'My Reincarnated Self in a Fantasy World'. It has an interesting plot where the main character, an original creation (oc), is reincarnated into a world full of potential love interests. The relationships develop gradually and the world - building is quite immersive.
I recommend to you the novel "The Immortal Is Poisonous", a novel about the fate of immortals and chivalrous men. The evil fate of the male and female protagonists in several lifetimes is intertwined and twisted tightly together. In this book, the male protagonist had a noble status and was surrounded by beautiful women in the harem. He was also destined to face all kinds of challenges and temptations, while the female protagonist was a demon who had been through several lifetimes and had a bumpy life. The disparity in their identities and the rugged fate between them made the love that they had reunited in this reincarnation cycle so touching. I hope you like this fairy's recommendation. Muah ~π
The main character might balance his relationships by being honest and upfront with each member of the harem. He could communicate his feelings clearly and also respect their individual personalities and goals.