Humans have forgotten the blessings of the sea. In their effort to dominate the world, they have soiled the sea with their weapons, dealing great damage to its inhabitants. Because of this, the great sea have sent its strongest emissary to deliver vengeance and invade humanity. That emissary is none other than Squid Girl, and she's here to invade your hearts!
I uploaded a YouTube video about the show but it immediately got blocked due to copyright issues, so here's another video about her mini-version instead. A bit of warning though, the video below contains a very high amount of concentrated cuteness capable of inducing multiple cardiac arrests. It is advised to call an ambulance before watching.