Shy, lonely, bored bookkeeper who digs up the magic flute of the Pied Piper. Magically able to play, he unknowingly charms a parade of wild animals from the woods back to the city. When he stops playing, the animals revert to their natural selves, and threaten the townspeople until superhero Mary Marvel stops them, and helps Joak figure out he needs to play again to lead them back to the forest.
She even helps Joak get a new, exciting job leading circus parades with his flute.
From the "Mary Marvel and the Magic Flute" story of Fawcett comic book Mary Marvel #14 (July 1947).