The Ephemeral Scenes of Setsuna's Journey, Vol. 3 (Light Novel)

"After parting ways with Tuuli, Setsuna and Alto happen upon a man being attacked by monsters in the middle of a forest and come to his aid. The man introduces himself as Cyrus, knight of Lypaed, and explains that he was banished from his country as punishment for a crime he did not commit. But when Setsuna processes everything the distraught Cyrus tells him, he realizes that, far from being cast out, the knight has actually been tasked with a secret mission to find an antidote for Lypaed's poisoned king. Feeling responsible for Cyrus, Setsuna and Alto decide to help him get back to his country before time runs out. Little do they know, however, this will put them on a collision course with someone connected to Tuuli"--