Sono Yo no Dokoka, Chizu ni Nai Kuni

Just south of the Kingdom of Garushe lies Oraie, a tiny island nation that has been closed to all outsiders and erased from all maps. Shin, a carefree adventurer, parachutes over its guarded walls, only to be captured immediately and told that he will never be allowed to leave the island after having stepped foot on it.

Now as a servant in the nation's palace, Shin witnesses the young ruler Musutia and his retainer, None, engage in a passionate kiss. But when Shin is caught snooping, None explains that he was simply administering antibodies from his lungs to slow the progression of a terminal lung disease that is sadly commonplace in Oraie. However, it is clear to Shin that the retainer has also repressed feelings for his young master that he dares not speak of.

Despite his lighthearted nature, Shin is determined to not only help the dying people of this isolated country but also guide Musutia and None toward finally revealing their feelings for each other.