Hamada's making dashi stock for a meal, and Tamada asks if she can have some. It's left in a bottle labled "Hamada no dashi", or "Hamada's dashi". Kinuyo's imagination goes wild and interprets it as dashi made with Hamada instead of by Hamada.
It's just so unusual...Hasn't Commander Nishi been blushing furiously all day today?...is the dashi of Hamada...H-Hey...
Hamada...I-Inside this...