In order to prevent the novel's heroine from being revised, Yuu must perfect his love of little sister moe. Yuu and Suzuka both attend Sakura's radio program as guests, and Yuu begins flirting with Suzuka while on air as part of his training to become moe for little sisters, but...
So I'll become your little sister, too!
Darum werde ich auch
deine kleine Schwester!
¡Yo también seré tu hermanita!
¡Yo también seré tu hermanita!
Je serai une petite sœur aussi !
Quindi diventerò anche io la sua sorellina!
Por isso vou me tornar sua irmã!
Я тоже стану твоей младшей сестрой!