Byakko Ibun is the story of Suzuno Osugi, the Priestess of Byakko and the adventurers of her Seishi. It takes place 100 years after Fushigi Yuugi: Genbu Kaiden (where Suzuno was briefly seen as an 8-year-old) and around 60-70 years before the original Fushigi Yuugi series.