The Angel's Tears

The darkness is my home. It is my element, my core.
Kael Renix is a demon. In fact, he is one of the best. He is cruel and cold; his icy heart unmovable by even the most desperate cries for mercy… But, he is getting bored. Even the agonizing screams of the burning souls in hell seemed mediocre to him now. They didn’t give him the thrill that was once there; the satisfaction of hearing another person’s misery that were music to the ears of demons. He found himself living the same way every day. Tempt mortals and immortals, and then torture their sinful souls.
Luckily for him, the King of Hell assigned him to stay in the mortal realm to tempt a human named Fred Matthews. The interesting thing wasn’t going there, but the guardian angel that was guiding the human. Her name was Elaina Silvis. She is kind and always smiling; a typical angel, but with an amusing twist. She isn’t afraid of the notorious Kael Renix. She doesn’t just take his taunts, she replies with a witty comeback and a smile. This makes her an intriguing individual in Kael’s eyes.
But one day, Kael sees Elaina crying. Will this make him see her in a different light? What effect will this have in Kael? Will he change? Or are the angel’s tears not enough to melt this demon’s heart?