Jin Andras, a first-year student at Tokyo Metropolitan Advanced Nurturing High School, is secretly a half-devil descendant of a extinct marquis rank devil noble house, House of Andras. 

In this world where devils, angels, and fallen angels exist, he, having just been promoted to a High-Class devil, search for excellent peerage members and rebuild his family. 

Upon finding his excellent yet sicky female classmate possess a Sacred Gear, he asked her, "Do you believe in the existence of devils?" 

This is the story of a half-devil, half-human, who gradually lets loose in this seemingly peaceful yet extraordinary world as he gather a full peerage of beautiful girls and rebuild his family. 

P. S - I have taken inspiration from various fanfics so don't blame me please.

Jin Andras Peerage