Kageyama stays with Karasuno in the manga. His character development and contributions to the team continue without him leaving. The bond he forms with his teammates keeps him committed to the club.
Sure, Karasuno beats Shiratorizawa in the manga. The match is full of thrilling moments and showcases the growth and determination of the Karasuno team.
One possible storyline could be a friendly exhibition match. The Karasuno boys are initially overconfident, thinking they'll easily win against the girl team. But as the match progresses, they realize the girls are much more skilled and tenacious than they expected. Another storyline could involve the girl team challenging Karasuno to a match to prove that girls can be just as good at volleyball. And there could be a sub - plot of a Karasuno player falling for a girl on the opposing team, adding some romantic tension to the story.
In a fanfic, it could really go either way. The Karasuno team has strong male players with different skills. But the girl team might have their own unique strategies and teamwork. If the Karasuno boys rely on their power and height, like Asahi's powerful spikes, they could have an advantage. However, the girl team could use their agility and quick thinking to outmaneuver them. It would make for an exciting match in the fanfic.
I don't know who xqc is in this context without more details. It could be someone's username, a streamer, or just a name given to a character in a particular situation.
I'm not entirely sure specifically what 'xqc reacts to neuro story' is about without more context. It could be that xqc, perhaps a person or a character, is reacting to a story that has something to do with the neuro (which could potentially refer to neuroscience, neural networks, or something related to the nervous system in a more general sense).
One popular 'Overwatch Reacts' fanfiction could be the ones where the Overwatch characters react to different timelines or alternate universes. For example, they might react to a world where the Omnic Crisis was never resolved. Another could be their reactions to new heroes joining the team. It's all about exploring the characters' personalities through these reaction scenarios.