Soulbound - Engineered Magic, #1

The last thing Damon expected when returning to Earth was to run into his old crush. The idea that she might be the Angel his father is trying to kill was so beyond anything he had considered that it took until she was standing in front of him with wings of light for him to figure it out. Now he's left having to protect the woman he loves from his father's efforts to kill her, while also making sure that no one pegs him for a traitor...