Forbidden Love// Sebastian x Angel Reader

When (y/n) was told she would have to go to Earth and put things back in order, she thought things couldn't get worse. She thought wrong. Ciel Phantomhive was in search of a new worker, because his servants were good for nothing. He soon was directed to (y/n), and she would receive training from Sebastian. She could sense the demon that Sebastian was, but he couldn't sense her. What can (y/n) do when she starts to fall for the demon, or more importantly, what will her punishment be?