This is a story about Yoon Jeonghan and Choi Seungcheol, two best friends from medical school who find themselves lost in the middle of a seemingly endless oak-brown forest and struggle to reconcile themselves, yet they find the most important thing amidst it all - EACH OTHER.

If the person you love leaves you for ten long years, how would you feel? If he suddenly came back and doesn't remember anything about you, what will you do? What if that person was an angel? Can you handle it? Miya did. Because she loved an angel. Because she loved Jeonghan.