The owner of Minamikaze has invited the girls of Lemon to his home, once there the mood changes drastically.  How can the girls escape?  Squid Girl is suffering from amnesia and everybody is trying to convince her she is an alien, girlfriend, or sister, but what about invader?  The Invasion Club has been formed, join and watch how they systematically invade the city.
You could've just met us on the field.
Du hättest doch einfach auf den Platz kommen können.
Pudiste vernos en el campo.
Podías habernos visto en el campo.
Tu aurais dû venir sur le terrain,
dans ce cas !
Você poderia ter nos 
encontrado no campo.