One plot idea could be a magical adventure where Issei and Yubelluna team up to save their world from a dark force. They could discover new powers along the way and their relationship could deepen as they face challenges together.
A more complex plot could involve a political intrigue in their realm. Issei and Yubelluna find themselves in the middle of a power struggle. They have to use their wits and Yubelluna's special abilities to outmaneuver their enemies while also dealing with their growing feelings for each other. This could involve a lot of tense moments, like when they are almost discovered plotting against the powerful adversaries.
One interesting plot idea could be Issei and Yubelluna teaming up to face a powerful new enemy that neither of them can defeat alone. They have to combine their unique abilities and learn to trust each other during the battle.
Well, there could be a story where Issei gets injured badly, and Ravel takes care of him. During this time, they start to see each other in a new light. It could also be about them participating in a tournament together, and their teamwork and growing bond make them a force to be reckoned with.
To write a great Issei Yubelluna Lemon Fanfiction, you should also do some research on the source material. Know the rules and the lore of their world. This will help you create a more believable story. Try to add some twists and turns to keep the readers on their toes. Maybe Issei has a secret power that he discovers during the story that changes the dynamic between him and Yubelluna. Also, get feedback from other fans. They can give you valuable insights on what works and what doesn't in your story.
One plot idea could be that Issei and Yasaka meet by chance in a magical forest. They initially have a misunderstanding but as they spend time together, they start to see the good in each other. Another could be a story where they team up to fight a common enemy and during the battles, their relationship deepens. Or perhaps a plot where Issei accidentally enters Yasaka's territory and has to prove his harmlessness, leading to an unexpected friendship and more.
One idea could be their married life facing challenges from the supernatural world. Maybe a new powerful enemy emerges that targets their relationship. Another could be a story about their attempts to start a family within the context of the supernatural realm, with all the unique difficulties that would entail.
One plot idea could be Issei discovers a hidden relic related to King Arthur. This relic gives him some of Arthur's powers, leading to a power - up journey where he has to learn to control these new abilities while also facing enemies who want the relic for themselves. Another idea is that Issei somehow travels back in time to the era of King Arthur and has to interact with the legend himself, maybe even joining Arthur's knights for a while.
Perhaps Issei discovers that there are exorcist families with ties to the DxD world in ways that no one suspected. He gets involved in their internal power struggles and has to choose sides while still maintaining his loyalty to his original friends. It could lead to some intense battles and moral dilemmas.
One idea could be that Issei discovers his half - vampire side gradually. At first, he notices small things like enhanced senses. He might struggle to control his newfound bloodlust, especially around his friends at school. Another plot could involve him seeking out other half - vampires or vampires to learn more about his heritage. This could lead to him getting involved in a hidden world of vampire politics.
One interesting plot idea could be Issei facing a new and extremely powerful rival in the form of a Diabolos Dragon hybrid. This new foe could have unique powers that Issei has to figure out how to counter. Another idea is Issei having to travel to a different dimension where Diabolos Dragons rule and he has to form alliances to survive. Maybe he discovers a long - lost power within himself that is related to the Diabolos Dragons during his adventures there.
Maybe a story where their marriage is threatened by an old enemy or a new threat that emerges. They have to fight not only to protect each other but also to save their marriage. This could lead to some intense action scenes and emotional moments as they reaffirm their love for each other.