It will premier in 2018 via Netflix

The official website of the anime of Lost Song has uploaded a new promo. Enjoy:

My ANime List describes the anime as follows:

“Rin (Konomi Suzuki), an energetic girl who loves to eat, lives in a verdant frontier village. Deep within the royal palace in the bustling capital city, the songstress Finis (Yukari Tamura) spends her days in solitude. Both share a special power no other person has. A miraculous power that can heal wounds, create water and stir the wind — the power of song. Guided by destiny, the two young women each face an arduous journey with the power of song. The shadow of war looms over the kingdom, tainting even the miraculous songs with the blood of innocents. Loved ones meet their deaths as silent screams echo through a stone prison. As two destinies intersect, will the final song be one of despair, hope or...?”

Via: Crunchyroll Latín América (Spanish)