Riddle Story of Devil

Akuma no Riddle is manga series written by KOUGA Yun and illustrated by MINAKATA Sunao.

Plot
At a boarding girls' high school where every student is assassin, they target only one life - "Ichinose Haru". Similarly, "Azuma Tokaku" is an assassin who transferred schools to target her, however she gradually became attracted to "Haru" and decided to protect her. Extreme school life START!