"Oneechan's the one at fault here, too". That 'too' bothers me, cause it's ambiguous. If it means like "she's at fault here, again", fine. And yes, Nagisa, not a nice reply.
But if it means "it's both of your faults", excuse you? Your drunk sister put her pillows of happines right on your crush's face, and as soon as he saw he LOOKED AWAY. And he still apologized, not knowing what about, simply cause you're pissed.
Wtf.
@shubh68 Yeah, as I say above, something about that doesn't sound right. Would have to check the raw to make sure, but I'm lazy XD