Summer! Swimsuits! The beach! Illya and the others enjoy the beach to fullest, playing along the shore and celebrating their birthday in a beach hut♪ But the popsicle seller they encounter there turns out to be the fierce foe they fought a hard pressed battle against... And to make matters worse, Ruby adds a Love Potion that makes Shirou go crazy! Will Illya's desires come to fruition in an unexpected way?!
I know your older brother,
Deinen Bruder kenne ich,
Sé que uno es tu hermano, pero...
Sé que uno es tu hermano, pero...
Je connais déjà ton frère,
mais qui est le binoclard ?
Quello so che è tuo fratello, ma...
Eu sei que aquele ali é o seu
 irmão mais velho, mas...