Idk if this has been posted yet but in Mayuyu's testimonial for the detective story CM she said Yuko had a good butt~
She said "Yuko-chan, I’m so sad. Yuko and I formed the unit “Oshiri Sisters”. Our debut date is undecided. Detective Maeda only looked at her chest, but Yuko-chan also has an amazing butt!"
Of course being the other half of the Oshiri sisters~