"You're not nii-san's girlfriend?"

That comment nearly made the both of you spit and or choke the ice cream that was going down each other's throats.

Who could blame the kid for mistaking you as her brother's romantic partner? Especially when you frequently hang out with them (with Kuro'e invitation), like right now. This was just supposed to be a peaceful ice cream outing! Way to go kid to make things a bit more awkward...