Mystery manga, all 13 volumes, by Yumi Tamura. - Title: Do Not Say Mystery - Author: Yumi Tamura - Volumes: Complete 13 volumes - Condition: Some signs of use Thank you for viewing. There are some folded corners. Also, I slightly bent the cover of volume 1 while listing. There may be other minor oversights, so please refrain from purchasing if you are concerned. Please refrain from price negotiations.