I had to drop it before even reading the LN. I wasted my whole day looking for the LN's online everywhere possible, but there was no single source to find full complete 12 volumes. The anime was excellent and underrated. The mystery would remain unsolved for me, I guess. The anime was about Nanana, who was killed by someone. To find her, all those secret treasure of hers needed to be found. The anime left with tremendous excitement. Till now, there is no official translation that I continue to read where it left off—so dropping this series for several years. I hope that I wouldbe lucky enough to continue this again.