The Genius Devil

Our heroine here is a 17-year-old girl who dreams of having her true love. She hoped that before she graduate, she'd find her true love. Little did she know that a demon whould be destined for her.
After days, her professor, announced that there will be a new student joining their school. Mr.Shiki Kurobane...
He was a tall, black-haired, quiet and mysterious boy who wears glasses. He wasn't sociable, never have been and never will be.
He got partnered with our heroine, Pholyhymnia Harmonia. She first felt awkward for Shiki was too quiet and doesn't much reply to her questions and statements. As she work with him, could there something be developed in a heart of a demon. Could Love be found in Muraki Highschool?
BUT!!!
What's this? Five demons, gathered around the dining table, Viewing the list of the names of the people who will...WHO WILL BE TOAST NEXT!!! Who's next?
"Pholyhymnia Harmonia," Shiki read.
Demons are not allowed to fall inlove with humans.