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...
It'll help your training if I act like 
a different little sister, won't it?
Es hilft dir beim Training,
wenn ich mich anders verhalte, oder nicht?
Te ayudaré en el entrenamiento haciendo
de hermanita diferente, ¿no?
Te ayudaré en el entrenamiento
siendo algo distinta a lo habitual.
Se mi comporto diversamente dal solito,
posso tornarti utile per allenarti, vero?
Vou te ajudar sendo uma
irmã diferente, entendeu?
Я ведь помогу тебе с исследованиями, 
если притворюсь другой?