McGregor's unruly behavior and his disrespect towards Khabib. He said things that were completely unacceptable. Khabib, being a proud fighter with strong values, couldn't let those remarks slide. So, he took on McGregor in the fight to set things straight and prove his worth in the MMA world.
Well, Kirei and Gilgamesh make for an interesting pairing in fanfiction. Their complex personalities can lead to some really intense and thought - provoking stories. Kirei's inner conflict and Gilgamesh's haughty nature can create a lot of drama and tension.
There was a girl and a boy in a competition. It was a race. The boy was overconfident and made some taunting remarks towards the girl before the race. This made the girl determined to win. During the race, the boy tried to block the girl's path a few times. The girl, not one to be bullied, elbowed him gently but firmly out of the way. In the end, the girl won and the boy was left fuming. But the girl just walked away with a proud smile on her face.
Once, I saw a wife and a mistress have an argument in a park. The wife found out about the mistress and confronted her. The mistress tried to act tough at first, but the wife was full of anger and rightful indignation. The wife started shouting about how the mistress was ruining her family. In the end, the mistress, feeling ashamed, ran away.
In this type of fanfiction, the 'fated encounter' trope is quite popular. Writers like to show how Kirei and Gilgamesh's paths cross in a way that seems almost predestined. It gives a sense of grandiosity to their relationship. Additionally, the 'clash of ideals' trope is often used. Gilgamesh's self - centered and somewhat hedonistic ideals might clash with Kirei's more conflicted moral compass, and this can create a lot of interesting plotlines as they either try to reconcile or go their separate ways.
I'm not aware of its popularity without more information. There are countless visual novels out there, and its popularity would depend on various factors like the quality of the story, the art, and the marketing.
Another idea is that Kiritsugu summons Shirou because he foresees a future threat that only Shirou can prevent. This could involve time - traveling elements. Shirou might have to go back in time to change certain events. During this process, he and Kiritsugu would have to work together to figure out how to manipulate time without causing major disruptions.
Jealousy. The wife is jealous of the mistress for stealing her husband's attention and love. And the mistress might be jealous of the wife's legal position in the man's life.
In RWBY fanfiction, the Weiss vs Winter fight can be a display of their different combat styles. Weiss is more about grace and precision with her Glyphs, while Winter, being more experienced, has a more refined and perhaps harsher style. Their fight could also explore their complex relationship as sisters.