The Iwatobi High School Swim Club is participating in a joint training camp with the Samezuka Academy and Soufuukan High School teams. Sousuke is also participating as an alumnus. In the midst of the excitement, Rei and Nagisa notice that something is odd about Romio's swimming. Then Shizuru tells them the story of what happened to Romio in middle school...
the Capybara of the Raging 
Rapids, Usami Aoba!
خنزير المياه سريعة الجريان الهائجة
!أوسامي أوبا
das Capybara der stürmischen
Stromschnellen, Usami Aoba!
¡El carpincho de los rápidos,
Aoba Usami!
¡El capibara de los rápidos,
Aoba Usami!
je suis le Cabiai des rapides,
Aoba Usami !
il capibara dell'onda travolgente!
a capivara das corredeiras
nervosas, Usami Aoba!
Капибара ревущих речных порогов, Аоба Усами!