Erika possesses a mysterious power that allows her to hear the voices of people’s hearts. While working as a maid in the royal castle, she begins to hear the nightly cries of someone suffering from exhaustion. To her surprise, the voice belongs to none other than Emperor Julius, renowned for his invincibility. When she offers to help him sleep peacefully to restore her quiet life, for some reason, he becomes incredibly fond of her!? “I love you, Erika. I want to be inside you!” Now, she finds herself tormented by the emperor’s lustful, unrestrained thoughts! Could His Majesty, praised as a superhuman, really be having such indecent fantasies…!? Thus begins the romantic struggle between a runaway emperor and his devoted maid!