The Four Heavenly Kings of the Demon King's army reign over a certain alternate world, and the one chosen as the fourth of them... is none other than an ordinary salaryman, Uchimura Dennosuke! After being headhunted by the Demon King's army, Uchimura is welcomed into a director-level position... but business in the Demon King's army is one life-or-death mission after another! Since Uchimura has no particular powers, he must tackle every challenge he faces in this new world using the experience and knowledge of a salaryman! This career change isekai tale is for all the working folks out there!

[Source: Crunchyroll]

After finally adopting a child, the Sonoyamas were unprepared for the mystery that would soon unravel. Hitori seems to be the perfect son for his loving parents. He’s handsome, intelligent, and grateful for his new lavish life—but he has a dark secret.

Hitori is actually the twins Migi and Dali pretending to be one boy. And they have a terrifying motive behind their hidden identity.

[Source: Crunchyroll]