She——Echizen Otomai. A true genius tennis princess, she won the world-class tennis women's youth competition. The adopted daughter of Echizen Nanjiro. Echizen Ryoma's adopted sister. Returning at this time, Echizen Ryuya followed her back from the United States! Ryuuga Echizen transferred to the high school of Seishun Academy, and Otomu Echizen transferred to the middle school. "Hey, little ghost head, let's play a game with me!" She blinked her big eyes and pestered Ryoma harmlessly. "You are so noisy!" "I have told you before, my goal is to beat you!" "You are still far away." A certain woman's face was full of black lines. "Smelly little devil!!!"