Karneval

Karneval is a Japanese manga series by Tōya Mikanagi which originally started serialization in the monthly Josei Manga magazine Monthly Comic Zero Sum published by Ichijinsha on August 28, 2007. There are currently twenty-five volumes released in Japan. The series follows Nai and Gareki, who join a defense organization called Circus in hopes of finding a man named Karoku. However, they are unaware that Karoku belongs to a secret organization called Kafka, which is responsible for performing human and animal experiments called Varugas. A 13-episode anime adaptation by Manglobe aired between April and June 2013.