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.
I feel like I just saw something 
I wasn't supposed to see.
Ich glaube ich habe etwas gesehen,
 was ich nicht hätte sehen sollen.
Siento que vi algo que no debía.
Siento que he visto algo que no debía.
J’ai vu quelque chose
que je n’aurais pas dû voir.
Sinto que vi algo que 
não deveria ter visto.