Red River Sora wa Akai Kawa no Hotori

After a mysterious hand drags her beneath a puddle, modern Japanese teenager Yuri awakens in the Hittite Empire of the 14th century BCE. Thrust into a deadly struggle for the throne, she joins Prince Kail to battle assassins, outwit royal conspiracies, and survive a world at war. As her exploits earn her renown as the goddess Ishtar, Yuri must choose between her old life and an uncertain future.

(Source: Crunchyroll)