My Younger Sister Spin-Off: Princess of Tennis

This is the story of 18 year old Echizen Rika. At her age, she have taken over the tennis world by her extraordinary skills and became the youngest Female Player who have gotten second for world tournaments, losing only to Ryoma. She thinks that the only rival that can meet up with her now is Ryoma and her Father, Nanjiroh. However, the trip back to Her homeland, Japan, to catch up with her Brother and other 'onii-chans' will prove her wrong.