Herbert, the eldest son and heir of a ducal family, has lived a life of indulgence, abusing his position.

Spoiled and having grown corpulent, he was derided by those around him as the "Pig Noble." One day, he receives a mysterious letter.

Inside, future events were chronicled in his own handwriting...?

Upon receiving a letter from his future self, twenty years hence, who had mastered space-time magic, Herbert's life begins to change profoundly——.

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