@Freestyle
The episode 11 of the anime covered the volume 5 entirely .... so you can understand that the adaptation was no good at all... but that's not the biggest problem.
The biggest problem is that the episode ended in a friendly manner while actually in the novel IT DOESN'T. There was a...
@dooopliss
the manga consists only 7 volumes and it's already no 3 so I don't think it will even cover the portion which is covered in the anime.
By the way you can read the light novel from Volume 5. The anime covered the the first 4 volumes correctly and the 5th volume WRONGLY so you have...