Fourth wall. The fact that Yuuka mentions the blueray thing is also fourth wall. XD
*Shine*Huh ... what are you talking about?Fine, just hurry it up.Show us.Eh ... it's that kind of light ...?Isn't that unnatural light removed in the Blu-Ray?*SMILE**SLIDE*I'm just showing you the part that lights up, nothing else, all right?Fin.Yes ma'am...shiver