Through a mixture of magic and squid-based technology comes an annoyingly catchy OP, straight to your brain. No need for words or thanks, or both; it's taking residence in your brain as you begin Shinryaku! Ika Musume. But don't worry, it's a taste for what's to come; slice-of-life comedy on the beach with an infectous cheer about it that produces smiles, wheather you want to smile or not. It's like the third ingredient is charm, right behind hijinks and sand. If you ain't laughing, you're smiling. Unless it's one of the "detour" moments. Regardless, it's feet are firmly planted in comedy and it delivers loads of it.
Before I forget, that synopsis is the story. It's not really important but it's there to set the pieces down on the board and let them do their thing. It's episodic in nature, so don't look too deep into it.
Essentially, everything revolves around the sun of charm; the animation is bright and vibrant, cheery and delightful. The music sets the mood for the scenes and once again, the OP. And the characters only go to further enhance it; They make it more fun than it already is. From the innocent and adorably arrogant (Self-righteous?) title character to her co-workers in The Lemon and everybody else who roams the beach. The best part is how they interact with each other and mainly with Ika Musume.
There's no way I could marathon this and not die from some kind of cuteness overdose or something of the like. But if taken daily in doses of one or two episodes per day, then I can handle it. And you know what? I wouldn't change it. It aims to be a charming and adorable slice-of-life comedy and it accomplishes just that.