Meiling , who works as a housekeeper for the wealthy Takiyama family, has been secretly in a romantic relationship with the only son, Shuichi, without the knowledge of her masters. Meiling is Kokoro to Shuichi's kindness, even though she tells herself not to get too involved. One day, her grandfather Souji sees her trying out with Shuichi and discovers their relationship... Souji, who is suspicious of the mismatched relationship between his precious only son and the housekeeper, encourages his son Takehiko, who is also Shuichi's father, to plot to break up the two...