User blog comment:GouenjiShuuya'123/Quick question/@comment-6532078-20140906202542

Yes, they follow the same plot, although anime skips lots of stuff (mostly important but small details) and makes things simpler (it gets better in s2 though), plus the last episodes of s1 are anime-original (and extremely bad imo). It covers 198/237 chapters - watching it before catching up would basically spoil you the whole plot so wait ^^