An old man is suddenly told by a mysterious being that he is going to die and gets reincarnated into another world. His new body is a powerless kitten that can’t do anything! He is reincarnated into another world where demons and demon tribes rule. The only thing he can rely on to survive in his cat body is the unique ability he was given when he was reincarnated, [The Collector]. The more items you collect, the stronger you become! This is a story of a single cat collecting items.