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.
It's like all this stuff flashed before 
my eyes and now I remember it all!
Wie ein Blitz vor meinen Augen
 und plötzlich weiß ich wieder alles.
¡Es como si mi vida hubiera
 pasado frente a mis ojos!
¡Es como si mi vida hubiera
 pasado frente a mis ojos!
Un tsunami de souvenirs a submergé
mon esprit, et j’ai retrouvé la mémoire !
É como se tudo surgisse de uma vez na 
frente dos meus olhos e eu me lembro de tudo.