DxD: Zenith Tempest

Leo Eligos, a third-year student at Sobu High, hides a secret— Behind his calm smile and flawless school life, he is, in truth, a devil. In a world where devils, angels, and fallen angels coexist, Leo has just ascended to the rank of High-Class Devil. Inside the Department of Mystical Affairs Club room, he turns to his beautiful junior and says— “Do you believe in devils?” Thus begins the story of a half-human, half-devil boy who seeks to build his own peerage, while slowly unraveling his own desires in a world that seems peaceful on the surface but is anything but ordinary. Devils don’t fall in love—not unless you willingly offer up your soul. — Description from novelcodex.org