Perhaps they start as rivals, but then they have to team up when a common enemy threatens their world. In the process, they find a lemon - themed magical artifact that binds their fates in an unexpected way. They gradually develop feelings for each other as they face various challenges together.
One idea could be that Ultear and Gray are on a mission together in a mysterious land filled with magical creatures. Along the way, they discover a hidden lemon grove that has some special magical properties related to their powers.
One idea could be a story where Gray and Ultear team up to face a new, powerful dark magic user. They have to combine their ice and time - magic skills to defeat the enemy. Another plot could be a more character - driven one, like Ultear trying to help Gray overcome some past traumas related to his family and Deliora.
Perhaps a plot where Ultear uses her time - related magic to go back in time and meet a younger Natsu. She initially has an ulterior motive but ends up falling for him. Their relationship develops in a series of flashbacks and present - day interactions, with a lot of emotional and some mildly romantic undertones, but without crossing into inappropriate territory.
One idea could be a story where Juvia and Gray get trapped in a magical realm together. In this realm, their powers are altered in strange ways, and they have to rely on each other more than ever. They start to discover new aspects of their relationship as they face various challenges.
For Gray, his cold exterior can be softened. The lemon - themed elements can be used to show his more sensitive side. For example, if he has to protect a lemon tree that is important to Ultear, it can reveal his caring nature. As for Ultear, her mysterious powers can be linked to the lemon elements. Maybe she can use lemon - scented magic or something similar to show her unique abilities.
One idea could be that they discover the pregnancy during a mission. Maybe they are in the middle of fighting some powerful enemy when Erza suddenly feels unwell and realizes she might be pregnant. It could add a whole new layer of drama to the story, with Gray being overly protective.
One idea could be that in a world where Natsu is female, she and Gray are paired on a difficult mission. They have to work together to defeat a powerful dark wizard. Along the way, they start to understand each other's fighting styles better and develop a mutual respect that turns into a budding friendship. Maybe Natsu's more emotional side as a female adds a new dynamic to their interactions.
One idea could be that they face challenges in preparing for the baby, like finding a suitable home. Maybe they have to deal with family reactions, both positive and negative. Another could be that during the pregnancy, they discover new things about each other's pasts.
A plot could involve Anakin discovering an ancient Gray Jedi artifact. This artifact holds the secrets of a long - lost form of Force - using that is neither fully light nor dark. As he delves into its mysteries, he has to fight off those who want to use it for evil purposes.
Maybe Gray has to team up with a dragon in order to defeat an ancient evil that threatens to destroy the world. The dragon could have its own motives and Gray has to figure out if he can trust it.
One possible plot could be that Goku, during his travels across different universes, somehow ends up in Ultear's world. At first, they are distrustful of each other. But as they face common enemies together, they gradually develop a mutual respect. Eventually, this could lead to a deep friendship that some might misinterpret as a romantic relationship, without any inappropriate 'lemon' aspects. They could team up to save Ultear's world from a powerful, dark force, with Goku teaching Ultear some of his unique fighting techniques along the way.