The day of the sports festival is finally here. Though Basara remains cautious of the mysterious enemy who manipulates people with magic, he happily enjoys the sports festival with Mio and Yuki as the three of them compete in the four-legged-race and enjoy their youth getting entangled and sweaty with each other. Meanwhile, Kurumi, who was placed in charge of guarding the school, discovers a suspicious individual. At almost the same time, a giant twister forms on the sports field. Basara fights to protect the students... but an unexpected individual appears!
This girl's my childhood friend, and Yuki's—
Sie ist meine Kindheitsfreundin
und Yukis …
Es mi amiga de la infancia 
y la hermana de Yuki...
Es mi amiga de la infancia 
y la hermana de Yuki...
C’est mon amie d’enfance 
et Yûki est…
Ti presento la mia amica d'infanzia,
 la sorella di Yu...
Ela é uma amiga de infância
 e a irmã mais nova da Yuki—
Она моей подруги детства Юки...