The Maine Coon is one of the largest domesticated cat breeds, standing out among other cats for its impressive size and intelligence. But regular salarywoman Saku Fukuzawa has a hard time explaining why her rescued black cat now towers over her. Yukichi is no run-of-the-mill cat; he is a masterful feline who has taken charge of the chores in the Fukuzawa household. While his master rushes to catch the train during the morning rush hour and works late into the night, the giant cat is diligently packing Saku's lunch, cooking her meals, cleaning their home, and buying groceries.

After the climactic battle to decide the fate of humanity, the hero Max, alongside his party, emerges victorious against the formidable Demon Lord. As he draws his last breath, the defeated Maou vows to return more powerful than ever to take his revenge. Ten years later, although Maou has resurrected, the process is incomplete, resulting in him taking on the form of a child. Nevertheless, not wanting to waste another second, Maou pays his nemesis a visit—but the hero who once gallantly protected humankind from the demon's clutches is now a pitiful slob bearing no resemblance to a man of his former caliber. Despite his disappointment, Maou moves in with Max in hope of building him back up into a worthy adversary. But as the demon learns more about the events that transpired in the decade of his absence, he realizes that there is a story behind Max's downfall that he knows nothing of.

The anime will take place 10 years after FLCL Alternative and will center on a high school boy and girl.

While the adults have no hope for tomorrow, the youth accept the decline and poverty of the city as an ordinary part of their reality until Haruko throws the city into chaos. (Source: Anime News Network)