Seinaru Kishi no Ankokudou

A young knight named Sain Forth is celebrated for his status and divine favor but chooses to leave for an academy in another kingdom. There, he faces rejection due to his unconventional choice to wear a black uniform. He befriends Alicia, a student from a prestigious magical lineage who struggles with her own limitations. Together, they consider exploring a labyrinth beneath the school in search of a holy sword. Instead, Sain seeks a doom sword to fulfill his ambition of becoming a Dark Knight. However, he is unable to use dark magic at all.