A genius who has yet to grow up cannot play tennis for life due to illness. He can only satisfy his desire for the tennis court by watching the anime Prince of Tennis. He travels to the world of Prince of Tennis and becomes Yukimura Seiichi's younger brother. Yukimura Takuya, in order to protect Yukimura Seiichi, strives to make himself stronger, in terms of spirit, body, skill, and triathlon.
