Hopefully it's longer, this had so much more potential
Why do they make anime’s out of mangas with less than 20 chapters? We going to be left on another 12 episode cliff hanger, forever. Never to see a season 2
Unfortunately it's cause of people's attention span.. studies show people consume anime better with 12 episode a season then 24 episodes sadly unless it's gets really popular.
So far the anime has changed a few things. The sister is sick and isn't involved in the fight. Rose also doesn't get much action either. Ages are also very different too. There's a few changes but idk if it really effects the story much. The anime isn't too far behind either. Only 10 episodes so far and he hasn't fought the demon yet. We will see how it goes.....
its bc theres another source they can get material from, the ln or wn, which is a common thing to do
Don't worry guys there is an anime in the works ... Will be aired at 2025
So we will have our fill and not rushed like in the manga