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...
All because my older brother 
has a sister complex.
Era por mi complejo por mi hermano.
Era por mi complejo por mi hermano.
à cause de mon frère
qui est fou de moi.
E questo perché suo fratello 
ha il complesso della sorellina.
Isso é porque meu irmão
tinha complexo com irmãs.
Всё из-за комплексов старшего брата.