my friend theorized the problem with season 2 of Ika Musume is that they have really already explored everything they could do with the current cast of characters and basically refuse to move onto to stuff that could provide new comedic material. a few new characters were introduced this season, sure, but it was really mostly the same stuff and it's less fresh to us now. doesn't help that the 'plot' isn't going anywhere.
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no misuzu you are the princess