This is the first episode of the Lion Books Series. The idea was to make 26 new episodes and canvass them for sale without any broadcast contract with TV stations. One can really feel the enthusiasm of the Tezuka Production staff to produce a quality work, as they enjoy the total process. The result is an SF masterpiece focused on the theme of invasion, in which a green cat that tricks the main character into vice is later proven to be a cosmic creature that plans to conquer the earth.

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