Our main character Sena is a girl who's parents pass away leaving her with two siblings to support. Thus being a high-school student she works as a maid for money. So what will happen when she finds out that the person she's working for is actually Souma, a boy who seems to have a hidden side?

From Mousou Scans:

Eva, a long-lived witch, takes in Fernest kingdom’s fifth prince, Louis, when she is asked to heal the first prince of an illness. Although witches are traditionally despised, Louis forms a close bond with her. When Louis is called back to the palace by a strange twist of fate to take his father's place on the throne, Eva must decide whether to let him go or follow.