|Fushigi Yuugi (Wondrous Game) is and 18 Volume manga series by Watase
Yuu originally published in Shojo Comics from 1992 to 1996.
While studying for High School entrance exams, Yuuki Miaka and her friend Yui find an ancient Chinese book called "The Universe of the Four Gods" at the library. According to the book, "This is the story of one girl who having gathered the Seven Seishi of "Suzaku" acquired the power to make any wishes come true. The story itself is a spell. One who finishes the book shall acquire the same power as the heroine and her wishes will come true. As soon as the page is turned the story will become the truth and begin." They are then sucked into the book and transported to an ancient Chinese world where Miaka becomes the heroine of the book.
Fushigi Yuugi ©Watase Yuu/Shogakukan