Naoto is Hiding Something:
Panel 1: Eri in her pajama's smiling saying "Men are all stupid. Even you're hiding those ears." Off screen says "Waaaah!"
Panel 2: Eri taking anal on her back pajama top open exposing her breast, her bottoms are off, glasses disheveled. She's slightly uncomfortable saying "Uhh! She me everything Naoto! Ah!"