Luterative

I have an idea for a manga call Lesser angel it's about an angel named Azreil(angel of mercy) him and two other angels which i do not have names for yet are going down to hell to try to stop an army of demons form attackign the heavens and anyway it starts like this they go to front gates of the castle of hell and they are all wearing cloaks until one of the front door guards starts hissing and making demon noises then Azreil in the front pulls out a rapier kills front door guard demon and he and his two friends continue on the attack inside the castle walls after a while Azreils allies fall and die then from the end of a long corridor which Azreil retreats to a big huge demon guy thingy walks through a door and says "if you want to kill an angel you have to clip it's wings." you can tell if this was a videogame this guy would be the first boss or subboss they have a fight it ends with the last sword clash of the fight azreil beheads the demon but the demon had cut off azreil's left wing now he is stuck in hell and cant return to heaven without full angelic powers then he totally slaughters everyone in the castle like he is berserk later on im thinking he makes a deal with the devil to become a full angel and be able to return to heaven but this means his left wing grows back and later becomes like a devil wing and it grows over him and he becomes more demon than angel!