Karen is an ordinary high school student in Tokyo, but she sometimes recalls pieces of her childhood memories that she did not know before. During the process of getting her passport for a school trip, Karen views her family register. She learns that she had an older sister Yukari, who died at the age of 4. Karen also learns that her parents are not her biological parents and that she was adopted. Karen now wants to learn about herself. She lies to her parents and tells them that she is leaving on the school trip. Instead, she travels to Fukuoka where she was born. Her classmate Satoi Hogari accompanies her.
Sawagura Nobuko is back housekeeping again in this sequel to the 2014 SP! This time around Nobuko, having been given some pearl earrings as a present sometime before, decides to attend an exhibition for a pearl described as being the world's most expensive one. That pearl is owned by the Iwakura family, who run a large pearl company. While looking at the pearl however, Nobuko is pulled away by a handsome man who seems to have some connection to the family. So when Nobuko finds one of her pearl earrings missing and probably taken by that man, she decides to work as a housekeeper for the Iwakura family until the man shows up again and she can get her earring back. But the Iwakura family that Nobuko is now working for has plenty of secrets beyond just pearls that she'll have to sort out if she wants her earring back...
