She's learned to love Koro, it's just that at first she's testing her. And the reason she's comparing Koro to a little dog, aside from she's really like one, we've seen that Yuriko had that dog stuff toy she really liked back then. On Koro's part, she even stated that she's glad to be of use to Yuriko. And the last part, blushing Yuriko while teasing her beloved is just too adorable.
Very well explain! =)
Seconded.
That omake too,lmao
