Story: not the most original on the book sure, but its handled well paced and makes it work altogether for the mystery purpose
Art: suits the story, i found it quite amazing
characters: all of them are interesting and very well developed during the story without dragging any of them around and adding interest to the entire bunch
enjoyment: absolutely enjoyable and worth a second read, even perhaps worth an anime or movie remake because gets you into the thing easily
overall: you can keep scrolling back to this one from time to time and still find it exciting, the plot works out fine and the characters bias makes you stick with it especially during first time read, final score: 10/10