Suzuno and Nichika are both the exchange students from Japan. Suzuno studied one year in Shanghai in 2015 and Nichika is the new student coming in 2018. Both of them are hosted by Ms Wang's family.  These two Japanese girls get long with the host family very well. Suzuno comes to shanghai to visit her host grandparents and expresses her gratitude to them. They told Ms Wang that they were so lucky to stay with her family.