The royal palace summons Sei once again. It seems they are getting a foreign exchange student, an imperial prince from Zaidera...

Sei remains wary around the imperial prince, but after learning a bit more of his situation, she grows curious about what he's really doing in the country.

Now that Sei knows Prince Ten'yuu needs her help, she tries to think of a way to create a panacea without exposing her powers as the Holy Saint.

It seems that Sei's duties as a Holy Saint are coming to an end with the purification of the last miasma swamp. Now Sei must start thinking about her future.