Yuuyan, the only other girl in Kazalm Academy is Erin&#039;s best friend. She is cheerful and always showed her support to Erin.     She has some feelings for Kashugan.     ~!She had been one of the first two alongside Tomura to take Kazalm Oath (Episode 23). Yuuyan, along with all the other students in a Erin&#039;s class leaves Kazalm upon graduation in tears, leaving Erin behind, who would be the teacher at Kazalm Academy (Episode 36).!~     ~!She and Kashugan are shown to have a family together in episodes 49 and 50!~

In the land of Ryoza, the neighboring provinces of Shin-Ou and Tai-Kou have been at peace. Queen Shinou is the ruler of Ryoza and her greatest general, Grand Duke Taikou, defends the kingdom with his army of powerful war-lizards known as the "Touda." Although the two regions have enjoyed a long-standing alliance, mounting tensions threaten to spark a fierce civil war. 
 
Within Ake, a village in Tai-Kou tasked with raising the Grand Duke's army, lives Erin, a bright girl who spends her days watching the work of her mother Soyon, the village's head Touda doctor. But while under Soyon's care, a disastrous incident befalls the Grand Duke's strongest Touda, and the peace that Erin and her mother had been enjoying vanishes as Soyon is punished severely. In a desperate attempt to save her mother, Erin ends up falling in a river and is swept towards Shin-Ou. 
 
Unable to return home, Erin must learn to lead a new life with completely different people, all while hunting for the truth of both beasts and humanity itself, with tensions between the two regions constantly escalating. 
 
(Source: MAL Rewrite)

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