what happened to high school dxd

Could be that the storylines became too complex or it didn't have enough audience interest. But that's just a guess.

The story mainly follows Issei Hyodo, a high school student who gets killed on his first date and is later resurrected as a devil. He then becomes part of the Occult Research Club at his school. There, he gets involved in various battles against other supernatural beings, all while trying to become stronger and also dealing with his new devilish desires and relationships with his female comrades.

Well, there are prequel novels that offer background on some of the characters and events. Also, there are companion novels that explore additional adventures and story arcs within the same world.

In a Naruto and High School DxD fanfiction, there could be a scenario where the protagonists of both stories meet in a neutral dimension. Issei from High School DxD might be intrigued by Naruto's ninja skills and determination. Naruto, in turn, could be curious about Issei's Sacred Gear. They could start training together, sharing their knowledge and skills, and ultimately have to face a common enemy that threatens both their worlds.

Yes, it is. The manga has completed its run.

Yes, the High School DxD novels are complete as of now.

Yes, it is. The story has reached its conclusion.

The 'Nishan High School story' could potentially cover a wide range of topics. It might involve the school's participation in sports competitions, where the students showed great teamwork and determination. Or perhaps it's about a cultural event held at the school that brought the whole community together. There could also be a story of a student's journey of self - discovery within the walls of Nishan High School.

I'm not sure. Maybe it had a happy ending or some unexpected twists. But without more context, it's hard to say for sure.

There aren't many direct novels specifically tied to High School DxD Season 3. But some spin-off or companion novels might exist that expand on the story or characters.