Ranko Mizuki

A wolf finds himself transformed into a teenage boy. (imdb)

When a hard-driving copywriter discovers his comely wife (Keiko Saito) is involved in a scintillating game of strip rock-paper-scissors with some guy clad only in a pair of boxer shorts and Mickey Mouse ears, he is less than happy. When the stranger tries to make a run for it, a fight ensues between the two men, and they accidentally tumble down several flights of a concrete stairwell. One hurried ambulance ride later, the copywriter finds himself in a private teaching hospital equipped...

It tells the story of Rock, a puppy whose mother is killed by a tiger and a fox. To fulfill his revenge, will achieve together a large number of animals.