Morita Hiroyuki, director of the TV anime ‘Bokurano‘, has admitted on his blog that he hates the original manga on which the anime is based on, and has in some ways, been making changes to the story with negative intentions towards the original work.
He continues with how he had asked the author of the manga if he could save the kids, with the author replying that it is fine as long as he doesn’t use magic, and that conversation basically set the direction that the anime was going to take.
And after writing about various things regarding the anime, he closes with the statement “The director of the anime version of ‘Bokurano’ hates the original work. Viewers should not expect to see any aspects that they liked about the original manga appearing in the anime. So fans of the manga, please stop watching the anime’