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.
The rule is the club needs 
five people so why don't we
Die Regeln des Clubs besagen, dass wir
 zu fünft sein müssen. Also warum
Las reglas del club dicen que debemos
 ser cinco, ¿por qué no la esperamos un rato?
Las reglas del club dicen que debemos
 ser cinco, ¿por qué no la esperamos un rato?
Nous devons toutes être réunies
pour envahir, alors attendons-la.
A regra é que um clube precisa 
de cinco pessoas, então