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 forced all of them join, didn't you?
Du hast sie alle gezwungen mitzumachen, oder?
Las obligaste a unirse, ¿no?
Pero las obligaste a unirse, ¿no?
Tu es sûre que tu n’as pas forcé
les gens à s’inscrire ?
Você quem forçou elas 
a entrarem, não foi?