Synopsis
Cadis Etrama di Raizel, the Noblesse known as Rai, is enrolled in Ye Ran High School by his servant Frankenstein so he can remain out of sight from the Union—a mysterious group seeking to capture Rai. Rai starts his student life, growing accustomed to his classmates and human daily routines. However, his new existence is far from tranquil, and Rai soon must rescue his friends after the Union abducts them. Meanwhile, M-21, a Union agent who went rogue during Rai's rescue operation, joins the Ye Ran High School security staff following an offer from the school's director—who is none other than Frankenstein himself. On the surface, M-21 appears to be a proper employee, but in truth, he is burdened by his former ties to the Union and the inevitable fallout from betraying the organization. To further complicate matters, the Nobles Regis K. Landegre and Seira J. Loyard enroll at the same school to investigate the Noblesse. While the Union hunts for M-21 to extract information about their missing agents, Rai must keep his identity concealed while protecting everything dear to him.