He wants to find his own way of chivalry! Theor, a young boy born into a family of assassins, was branded "incompetent" by his uncle, the head of the family, and banished. Because Theor's stealth skills were so high, no one in his family realized that he was also a powerful assassin magic user...! Taking his banishment as an opportunity, Theor decides to become the knight he has always dreamed of becoming, and joins the Sixth Knights of the Kingdom of Oikot. While carrying out missions using assassin magic alongside his senior knight Lina and other unique companions, the former strongest assassin awakens to his mission to protect the people! From an assassin who takes lives to a knight who protects the people - the story of this former assassin and unrivaled knight begins! (Source: Kadokawa, translated)

Harunei, a fallen noblewoman who lost her mother, takes refuge in a baron's household. She is treated like a servant, and her mother's keepsake, an amethyst hairpin, is sold. Harunei visits Keishin, the art dealer rumored to be a demon, who bought the hairpin. The condition for getting it back is a "political marriage." He wanted to use Harunei's family background for his business. "I, with the eyes of a demon, exist only to manage cursed items," Keishin says, closing himself off from the world. But his eyes shine like the amethyst in the hairpin, enveloping Harunei in warmth. Now it is Harunei's turn to sincerely wish to save him, a man who has never been loved by anyone... (Source: Kadokawa, translated)

Manga Anthology based on the anime "Fushigi no Umi no Nadia".