If you plan to watch the anime. You should read the manga first. I really prefer the manga over the anime. I think the anime compressed the story to the point that hey, what happen there, leaving you to read the manga. Moving on, the story is impressive, it makes you wonder who the culprit is. It is not predictable. The author also gives light to the story of villain while he did not highlight the romance side. Each character has this own sort of mystery. I did enjoy reading this one if you are a fan of mind-blowing manga you should read this one.