Rengoku no Karutagura

Other names: 炼国的cartagra, 煉國のカルタグラ, คาร์ทากร้า แดนชำระบาป, Purgatory of Cartagra, Rengoku no Cartagra

Status: Complete

From The Zero Alliance: At Seirei Academy, a series of mysterious demonic ceremonies have been taking place and the transfer student, Yuriya Yuuki is suspected by his classmates. One evening, from his dormitory window, Yuriya sees a girl wandering outside and follows her. Once outside, he encounters a book which allows him to summon the demon Belial, whom invites Yuriya to enter into a contract with him…