Nobara To Pretender summary:

To make enough money for medicine for his ill, bed-ridden mother, Noah travels far from his homeland to the Reinhardt household. On his first day working as a servant, the lord of the household, Rupard, makes a sudden announcement that he and Noah are “lovers” in order to avoid a political marriage. As the two spend time together, Noah becomes aware of the loneliness the distant Rupard hides in his heart. On the other hand, Rupard starts to become smitten with Noah’s carefree smile and naivety.