I love all of her work so far, but Saiyuki is the only one that touches on overtly mythic themes (and there's the nine-volume Saiyuki first, followed up by Saiyuki Reload, which is ongoing, and then there's Saiyuki Gaiden, which deals with the characters' previous incarnations, five hundred years ago in Heaven). Wild Adapter deals with youth yakuza and a drug with some very interesting effects in pre-Millenial Yokohama. Bus Gamer, of which there's only one volume, is about crazy life-and-death games corporations will pay people to play. Araiso High School Student Council Executive Committee (boy, I hope I got all that right) is an AU of Wild Adapter which removes the speculative elements and sets the characters down in high school for some madcap adventures. Of the non-Saiyuki, Wild Adapter is my favorite, but again, there's only one volume of Bus Gamer, and Araiso is missing the speculative elements. Also, the intensely claustrophobic focus the central characters have on each other in Wild Adapter.