I am Echizen Ryuya. I just had a match with Ryoma on a cruise ship not long ago, which ignited my tennis soul. I left quietly on the yacht with the sunset, but unfortunately I got lost. I was picked up by a group of people. I defeated the No. 4 Among them. Their boss invited me to be their new No. 4. I thought of bringing Ryoma back to the United States and agreed. Note: Ryoma and Ryoma will not leave the American team, and they will mostly use the original works. If you don't like it, don't join.
Concept: Echizen Ryuya is a younger brother