Everyone's heard the legend of the Battle Wolf, the king of beasts. However, very few know of the remaining existence of that same beast, lingering in the Gourmet World. Oka, or 'Okami-Ryuu', is the only person to have ever met the beast in person. Orphaned as a child and used to become a Chain Animal, Oka has begun to finally show emotions separate from instincts. Thus, IGO has decided to place this 'Fifth Heavenly King' within the care, or at least company, of another King.