Red River, aka Anatolia Story, by Chie Shinohara
Categories: Adventure, Drama, Fantasy, Historical, Mature, Romance, Shoujo
Plot: One day while walking home, Yuuri Suzuki is magically pulled through a puddle of water and finds herself in the past, or more precisely 1500 B.C. Location: The Hittite Empire, Anatolia. There the queen was to use her as a sacrifice, but she was saved by the queens nephew, who is also a heir to the throne. Now she must try to stay alive and get back to her time while hopefully not altering the future.
Personal Opinion: While not dipping into smut, I have to admit this was the best shojo series I've ever come across, and that's saying something. The artwork is very shojo-like, but it's still well drawn and the exposition, character development, and story pace are executed very nicely - I can't complain much about this series except for some of the shitty-quality scans. It's a must read for suckers of romance.
Link for downloading, requires registration but it's free: http://www.slipstreamanime.com/forums/showthread.php?t=166
And a online viewing link: http://www.onemanga.com/Red_River/