THE BASEMENT.

"Is it acceptable to take pleasure in killing?"

Clearly, it isn't. He is well aware of this. Even so, he enjoys killing. He likes to play with the lives of others.

"I kill to avenge them who have ruined me.
"I kill to the demands of the devil who's within me."
"I kill to ensure my own survival."
"I kill to make myself feel more ...alive."

This story is about Kai Takahashi, a psychopathic boy who sold his soul to the devil and is now a devil himself who enjoys killing people.