Red River

A seemingly ordinary modern day teenager, Yuri, is suddenly whisked away to the Hittite empire in ancient Anatolia, where an ambitious queen wants the girl for a blood sacrifice in order to murder all heirs but her son, thus seizing control of the throne. Luckily, the timely intervention of Prince Kail saves Yuri from the queen's grasp. Kail promises to send Yuri back to her home, but the queen's persistent schemes to kill them both, plus their growing feelings for each other, keep those plans delayed. (Source: Wikipedia) Included one-shot: Volume 28: Orontes Renka

Sora wa Akai Kawa no Hotori won the 46th Shogakukan Manga Award in the Shoujo category in 2000. The series was published in English as Red River by VIZ Media under the Shojo Beat imprint from May 26, 2004, to January 12, 2010, and as 3-in-1 omnibus volumes since October 15, 2024.