Seirei Gensouki: Spirit Chronicles: Omnibus 8

Contains the complete volumes 15-16! Things might be working out for Rio. Revenge is his at last; his heroic deeds have been rewarded with a place in Galarc Castle and the honorable duty of protecting the royal siblings. Trouble brews regardless--an unexpected visitor with a cryptic agenda, a string of unsettling international incidents, and the politically complicated advances of Princess Charlotte. Meanwhile, Liselotte tangles with a romantic debacle of her own as Sakata sets his sights on her!