The first volume debuted at the 40th spot in the list of 100 best-selling graphic novels for August 2006 with an estimated 2,400 copies sold. The second volume appeared at the 58th spot with an estimated 2,204 copies sold in October 2007. In May 2009, the third volume sold an estimated 1,386 copies and reached the 76th spot on the list. It also reached the 19th spot in Bookscan's list of the top twenty best-selling graphic novels for May 2009, and ranked 4th on the "New York Times" manga bestseller list for the week of May 10 to 16.