Valkyrie no Bouken: Toki no Kagi Densetsu

Once upon a time, in the world of Marvel Land, people and nature lived together in a peaceful and harmonic coexistence. All the animals were docile. Humans, Sandras, Quarkmen, Tattas, and other races mingled with one another and worked to make Marvel Land into an increasingly beautiful place to live.

A large clock tower resembling a stone grandfather clock stood watch over the countryside of Marvel Land. Long ago, an ancient evil had been sealed within the clock tower. The people needn't fret, however. For those days had long since passed, or so they had thought.