The Sheep in Wolf's Clothing

In the desperate search for the spark, Kier finds himself in a suburban town feeding off of the animals roaming the forest surrounding it. But his search comes to a successful end when he spots his spark, a young male living close to the edge of the town. The spark of complete satisfaction of lust is all Kier is after, and he can have it multiple times if he plays it right and prevents himself from killing the boy by accident the first time.

What happens when he begins to develop feelings for something he had previously only thought of as a mere tool, at most a rape slave? What happens when he finds himself actually growing weak for the boy?