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.
Yes, there's a big difference. The hentai version is usually adult-oriented and doesn't represent the true essence and story of the original Haikyuu manga.
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.
I have no definite answer. Sometimes manga series end when the story feels complete to the creator or when publishing circumstances change. So, we'll just have to wait and see.
The Haikyuu manga is indeed over. It had a great run and left a lasting impression on readers. The story came to a satisfying end, tying up loose ends and giving closure to the characters' arcs.