Akuma no Riddle: Riddle Story of Devil Vol. 3

At a prestigious all-girls boarding school, Haru is one of the most popular girls on campus. The attention paid to her, however, is about to turn deadly. Enter Tokaku Azuma, a cold-blooded female assassin, who moves from one mission to the next with deadly precision. The heartless Tokaku has set her sights on Haru as her next target.