Sora wa Akai Kawa no Hotori

Yuri, a modern day teenager who had just received her first kiss, is suddenly whisked away to ancient Anatolia where an evil queen wants her for a blood sacrifice. Luckily, 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.