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Artist's commentary
This is the Abyssal Onsen Inn
Battleship Hime: Even though you're Ta-kyuu (Ta-class), you're pretty bad at Takkyuu (table tennis). (lol)
Ta-class battleship: Hey, that's got nothing to do with it!
Seaport hime: Hoppo-chan...
Northern ocean hime: Fu-fu-fu.
And in the back you can hear Isolated island oni screaming.