About the Don't Call It Mystery Omnibus Manga Volume 5-6

AN ANGEL OF MERCY?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?