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One day, a mother cat takes her three children for a walk and discovers an abandoned kitten named Tora-chan by the side of a river. Taking pity on the poor kitty, she takes him home, giving him milk to drink, clothes to wear and games to play. However, the youngest of the children, Miike, is jealous of the amount of attention her new sibling is receiving and runs away from home. When the rest of the family discovers her absence the following morning, Tora-chan feels wracked with guilt and heads off alone to find her...
Provided the world ends tomorrow, what would we want in the last day of grace? A beam of light embraces a woman and a man then, the world gently closes its eyes.