For those of you patient enough to sit ALL the way after the credits and the next-episode preview (where Pegasus does an ADORABLE post-molestation moe-girl impression), you'll see official artwork by the staff that shows what Sena REALLY did to Traumatize Kobato-chan.
I trust you'll make a reproductively-correct version of this pic that we'll see one day on Sankakucomplex, yes, Mighty Mangatron?