Black Bullet is a Japanese light novel series written by Shiden Kanzaki and illustrated by Saki Ukai, published under ASCII Media Works's Dengeki Bunko imprint. The series began publication on July 10, 2011, and 7 volumes have been published as of April 2014.The anime adaptation aired from April 8, 2014 to July 1, 2014, and was simulcast outside Japan by Crunchyroll.
This anime is not that hot as No Game No Life and Tokyo Ghoul, but it does have some faithful fans. And if you are one of them and want to cosplay the main characters like Enju, Rentaro, Kisara, Tina Sprout, Miori Shiba, Kagetane Hiruko, Kohina Hiruko and so on, you can just search in Rolecosplay online shop. Most costumes can be found with high quality but cheap price!