The anime ends around chapter 52 in the manga but the anime also skipped a few chapters and things so read chapters 40-43 as they skipped those chapters and start at chapter 53
A bit late now, but actually it's chapter 40-45 (and the first half of chapter 46) that have been skipped, also you need to read the last 10 or so pages of chapter 52 as well. Then you should be more or less set for reading on.