Issei befriends a teenage nun Asia Argento but hides his devil identity from her. After Rias warns Issei about the dangers of the Church, the team must battle a stray devil. Rias briefs Issei on the Evil Pieces system where each member of her team has a certain role similar to chess pieces, where Rias is the king, but Issei is the pawn. Issei's next assignment becomes difficult when he must deal with a ruthless exorcist Freed Sellzen. However, Asia, working for Freed, witnesses the incident and attempts to stop Freed from killing Issei. Rias and the other members rescue Issei but leave Asia behind, to his dismay.