Joshua Break is a failure student in the temple for training priests, the <Tower of Seikon>. He doesn’t have any aptitude as one, not being able to even summon a that enables one to utilize Divine Magic. But he has a secret. He was once an assassin of the <Red Gem Brigade>, and has a marital contract with a single digit ranked <Dai Masou> thunderbird Suuriin. If this comes to light, it’s capital punishment! But even so, Joshua aims to be a first class priest while hiding all that and making sure his wife doesn’t go on a rampage!