Someone killed Naruto Uzumaki, 7 Hokage of Konoha Village, while he was sleeping and planted all the evidence to frame Boruto. And everyone believed except Sarada. Even Hinata, Boruto's mother, believed that her son killed her husband. Sarada decided to help Boruto find the real killer. Yusada Terumi is Mei's daughter and became the 6th Mizukage of Kiri Village. The title is not inherited, Yusada deserved it by right. Yusada also participated in the shinobi war. She is the jinchūriki of Matatabi