if Kaga's pose and line close to a scene in the anime, i think most probably it is a reference. i dont watch tokyo ghoul so i cant verify it, someone watched it can. just add tag if you feel it right
Updated
Today's Menu
Grilled Penguin and Cotton balls.Eh?
You mean...Don't underestimate the 1stCarDiv's hunger.Lunchless?!Dinner is in 5 hours, yes?All the remaining ingredients have been put aside to make dinner, unfortunately. Five hours later!!
It'd be fine
Excuse me, another Katsudon...W-We're sorry.
if I were to eat you.
Well now, 5 hours! If you were to take an afternoon nap, that's it, done with! Or perhaps, you could whittle away the time playing a game or such with us?*grumble*Seesaw game!