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...
I'm talking about the little 
sister duel. Remember?
Na, der Wettkampf der kleinen Schwestern.
Macht’s klick?
Hablaba sobre nuestro
encuentro de hermanitas.
Hablaba sobre nuestra
batalla de hermanitas.
Tu sais bien.
Sto parlando della battaglia
a fare la sorellina, ricordi?
Estou falando da disputa de irmãs.
Ты что? Забыл про наш
поединок с твоей сестрой?