Most of the stories in it are short stories, very independent.
There is no specific protagonist, only specific CP. It's not necessarily true that some anime will have multiple characters. It all depends on the author's personal bad taste. For example, in Naruto, it was planned to be written as Uncle Itachi's Suffering or something...
=W= These are all my personal thoughts while watching anime~ If you like those anime, please give it a try~
Also, there is probably no meat in the article. We want to be harmonious, and even if there is, it will be written in a more obscure way...