It's definately original allright. Rather short and no backstory really. All that were told is that Green is told to surrender to the Grey for some reason. It's rather confusing that the first Grey guy calls the Green guy Sir and waking him up. I've never known an assasin to announce he's going to kill you before he does it. It's pretty good animation but very hard to follow if they have no boides. Also, don't keep the guys axe black all the time. If you want it shadowed, turn dwn the brightness of the colours on it or it's just silly.