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.
So which one of them is telling the truth?
Wer sagt denn jetzt die Wahrheit?
¿Cuál dice la verdad?
¿Cuál dice la verdad?
Qui me dit la vérité ?
Então, quem delas está 
falando a verdade?