I was Reborn as a Housekeeper in a Parallel World!

Erena, a normal teen girl, dies in a fire and is reborn in a parallel world. Using the domestic skills she honed in her family full of men, she now works as a housekeeper for a kind elderly couple. But one day, her employers move in with their son, who lives in the royal castle. It turns out that the couple Erena's been serving is actually the previous King and Queen, and their son is the current King! Can Erena help the king lead his kingdom to prosperity with her handy housekeeping knowledge?