Kingin Sasameku Himitsu wa Yoru Twinkling Secrets Told Us Tonight Is the Night.

Synopsis

Alloy uses magic to support the nation's lifeline and is the active leader of the operational department. With his beauty and friendly personality, he does not take advantage of his noble lineage and is adored by everyone around him. On the other hand, Mikado, a poker-faced workaholic seems to not get along with Alloy like everyone else. They are on opposite wavelengths, but the two are actually in a secret relationship? (Source: Gentosha Comics, translated)