Kuro, a black cat, was saved from near death by his kind-hearted master.

Wanting to give strength to his always-down-at-hearted master, he takes on a human form.

As they live together, Kuro begins to feel something other than the desire to repay the favor...

This is the story of an unconscious black cat who becomes aware of his own feelings and uses his male instincts to attack his master.