1)
The Aizawa sisters run the business at the sea "Lemon" where they serve beach goers.
During their busiest hour, a strange girl appears before the younger sister Eiko.
A hat with three points, wavy, water-colored hair, and a white one-piece suit.
She calls herself Squid Girl and claims to be a messenger from the sea who's come to subdue humanity.
When Eiko tries to dismiss her ludicruous speech, she unleashes the wrath of Squid Girl.

2)
Squid Girl is stuck working for the house at the sea "Lemon".
Being worked so hard, she feels down when a shadow creeps up on her.
When she tries to run from that shadow, her tentacles are grabbed.
When she turns around, she sees a boy's face, full of curiosity.

3)
Due to the rain, the Lemon is deserted.
Because of the chill, Squid Girl sneezes and covers the older sister Chizuru in a black liquid.
When Chizuru licks this liquid...
She realizes it's tasty tasty squid ink.
When Squid Girl finds out that humans eat spaghetti mixed with squid ink...
I am going to use this house as a base
to squidly subdue humanity!
Dieses Haus wird meine Basis zur
 kalmarigen Unterwerfung der Menschheit!
¡Usaré esta casa como base para la 
calamaresca invasión de la humanidad!
¡A partir de este momento, usaré esta casa 
como base para subyugar a la humanidad!
À partir de maintenant,
je réquisitionne cette maison.
Vou usar essa casa como Quartel-General 
para subjugar a humanidade!