The plot could start with Majin Vegeta's pride getting in the way. He might feel that Bulma is disrespecting his new power as Majin Vegeta. So, he challenges her to a fight. Bulma initially panics but then decides to stand her ground. She uses her knowledge of Saiyan physiology (from all the time she's spent with Vegeta and the other Saiyans) to find his weak points. However, she also tries to reach out to the real Vegeta inside. As the fight progresses, Vegeta starts to see how strong - willed Bulma is and slowly begins to break free from the Majin influence.
Maybe in the fanfic, Majin Boo has done something extremely unforgivable to Bulma, like harming her family or friends. This could be the reason for her inability to forgive.
One possible source of angst in such a fanfic could be the internal struggle of Majin Vegeta. He has this new, dark power that might put his relationship with Bulma at risk. For example, his altered state of mind due to the Majin influence could lead to him pushing Bulma away, fearing he'll harm her.
In fanfiction, the relationship between Majin Vegeta and Bulma can be complex. Sometimes it might explore a more emotional and troubled side. Maybe Majin Vegeta's transformation causes him to have internal struggles that affect his relationship with Bulma, leading to sad moments.
The relationship in the 'Majin Vegeta x Bulma Fanfic' can be quite interesting. Majin Vegeta is a character with a new set of emotions and powers. Bulma, on the other hand, is a smart and strong - willed woman. The fanfic may depict how their relationship evolves in the face of challenges, like Vegeta's inner struggle with his new form and Bulma's attempts to understand him. It might also show how their love endures or changes during this unique situation.
In a fanfiction where Majin Boo invades the Naruto universe, the first thing that might happen is that there would be mass panic. Majin Boo's appearance would be something out of the ordinary for the Naruto characters. The Kages would have to quickly assemble and come up with a plan. They might try to use sealing jutsus which are common in the Naruto world. However, Majin Boo's resistance to such things in his own universe might make it difficult. The characters like Rock Lee, who rely on physical combat, would find it tough as Majin Boo can take a lot of punishment. And the story could also explore how the different chakra natures interact with Majin Boo's magic - like powers.
I'm sorry, I haven't read a specific 'bulma wintt forgive majin boo fanfic' so I can't recommend one directly. You could try searching on fanfic websites like FanFiction.net or Archive of Our Own.
One possible plot could be that Majin Boo has done something really bad that affects Bulma. But then, through a series of events, like Majin Boo saving Bulma's life or showing remorse in a very genuine way, Bulma begins to consider forgiveness. Maybe Majin Boo has to sacrifice something important to prove his change of heart, and in the end, Bulma fully forgives him.
It could also be due to the general nature of Majin Boo. He was initially a villain created for evil purposes. His appearance and the way he carried out his actions were often grotesque and malevolent. Bulma, who is used to a more civilized and scientific environment, might be repulsed by his very existence and find it unforgivable that he was able to cause so much trouble in their world.