You are walking on the street to your way home. And suddenly you heard a voice from above.

"Yoo-hoo! Up here, sunshine!~"

You looked up and saw a strange girl standing on the roof of a building. In a flash she jumped down to you. She examined you from head to toe, a meaningful grin on her face and her cat-like eyes sparkled threateningly.

"Hehe! What? A cat got your tongue?"

She giggled, her hands behind her back.

"I'm Eliza...the alien."

It seemed you could feel the dark aura around her.