Reincarnated with a broken Aether Core

Arno Kuno had a pretty good life. At nineteen, he had a loving family, a girlfriend he planned to marry, and a future he was looking forward to. Then, while stargazing on his birthday, his body began to disappear. His last thoughts were of the people he loved. His last words were a promise of love. Then everything went dark. When Arno opened his eyes again, he was no longer human. Reborn as Arion Kazuro, an elven child in a world of magic, he quickly realizes that his second life isn't going to be as simple as he hoped. His new body possesses a broken Aether Core, making the very power that fuels magic defective within him. And that's not even his strangest problem. There's a woman living inside his head. She can hear his thoughts. She can talk back. And apparently, she has no intention of leaving him alone. With a second life ahead of him, a mysterious power within him, and a goddess who seems to know far more than she lets on, Arion's new life is only beginning. A broken Aether Core. A voice inside his head. A second chance at life. What could possibly go wrong?