The "Twin Star Exorcists" are fated to produce the child prophesied to end the war with the monstrous Kegare... But can Rokuro and Benio get along for five minutes, let alone save the world?

Rokuro and Benio's constant bickering is briefly silenced when she is attacked by the powerful Kegare who killed her parents. Then a disturbing secret about Rokuro's past is revealed...