Book 1 of the Divine Renegade series:
Aetheros, an angelic assassin, has been assigned a mission from the current leader of the angels, King Gabrill, to go into the Mortal Realm to stop the resurrection of the two evil entities that plagued the cosmos in the past, God and Satan.
Accompanying Aetheros on his mission is a rookie, named Cuppia, for reasons unknown and Aetheros is not pleased about the idea of taking this young girl on such a dangerous mission despite the king's protests.
Regardless, the mission itself is simple enough: Stop God and Satan from reawakening and wreaking havoc over reality… However as the mission progressed, the two angels ran into more trouble than they hoped for.
Now angered by the outcome of the mission, Aetheros decides to take matters into his hands by tying up the loose ends that have infested the Mythical Realm. Luckily for the angel, he has some friends that are capable enough to help him achieve that goal.