Don't Call it Mystery Manga Omnibus Volume 3 collects volumes 5-6 and features story and art by Yumi Tamura.

Kunou Totonou keeps finding himself right in the middle of mystery after mystery. After taking a tumble down a hill, Totonou is hurt and ends up in the hospital. There he meets a beautiful young woman named Leica. As he follows her coded instructions, he uncovers a disturbing urban legend about an “Angel of Embers” who’s made it their mission to save children. But who exactly is this “angel” and what are their true intentions?