A boy reincarnated in another world as a cat-man, the weakest race with no strength or stamina. Then he gains a cheat ability! However, the magic he obtained is a useless "empty attribute" magic that is ridiculed as worthless. However, the boy is happy to have acquired rare magic, and by using his ingenuity and training, he realizes the true power of sky attribute magic. The infinite possibilities hidden in the sky will lead Nyango to become the strongest!! The adventure story of the treacherous yet brave black cat Nyango begins!