The Sky Is at the Banks of the Red River

Yuri, a modern day teenager who had just received her first kiss, is suddenly whisked away
to ancient Anatolia, where an evil queen needs her for a blood sacrifice.
Thankfully the timely intervention of Prince Kail saves Yuri from the queen's grasp. For now.
Kail promises to send Yuri back to her home, but the queen's persistent schemes to kill them both,
plus their growing interest in each other, keep those plans delayed.

Winner of 2001 Shogakukan Manga Award for Shōjo

Note: Final 28th volume contains a side story called Orontes Renka, set in the same historical period.

The Hittite empire is about to become an Egyptian territory through marriage between the Hittite princess and the Egyptian king.
A traveler from Egypt, Maripas, visits Anatolia at that time but gets robbed of all his belongings while playing good samaritan.
He's thankfully offered shelter by an unusually well-educated Hittite woman named Yuri.
But this seemingly innocent meeting soon turns into a thrilling romantic adventure –
cases of mistaken identity and runaway royals are about to complicate international relations!