Actually I think the Admiral is completely innocent. As stated in the first page of the chapter that the lunch was special, and he was clueless that the today lunch was unusually decorated so he simply reported how the center was smashed unaware it is was to be a nice heart. Ignoring it, he does not understand Kaga reaction and also tells it was great.
It really had a loving feeling to it!When I opened the lunchbox,It was all smushed against the edge - what a shame, yeah? *heart thumping* *heart thumping* *heart thumping* W-What's the matter!?But it was delicious...