The world is full of ____

The story is set at Myoujou Academy, a private girls' boarding school. The 10th year's Kurogumi class has 12 assassins with their sights on one target, Haru Ichinose. Tokaku Azuma is a recent transfer student who is also targeting Ichinose, but she gradually develops feelings for Ichinose.

Official site[akuma-riddle.com]
MyAnimeList page[myanimelist.net]
Torrents on HaruhiChan[haruhichan.com]