I honestly don't know too much about the content of the novel, but here is the info necessary to get your own. ISBN #4-09-420778-3, author is Nishizaki Megumi, and publisher is Shogagukan.

For the best actual info on the content of the novel, go to Kai Ling's wonderful page, Fushigi Yuugi Gaiden 6 Sei Ran Den

Also excellent is Tetris no Miko's translations of the book as hosted by Seimei, go to Ignisfatuus Translations of Sei Ran Den - currently being moved to Seimei's new server home.

Character list
Pg. 13 - receiving flowers	Pg. 31 - Ayuru and his mother
Pg.51 - poor girl...	Pg.71 - that's the Nakago we know!
Pg.85 - enter Soi...	Pg.99 - enter Tomo...
Pg.141 - "May I raise your chi again, Nakago-sama?"	Pg.157 - faceoff in the garden
Pg.167 - acceptance and forgiveness	Pg.185 - Seiryuu Seishi Nakago