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 happened on a summer day last year.
Es geschah an einem Sommertag im letzten Jahr.
Pasó en un día de verano del año pasado.
Pasó en un día de verano del año pasado.
Ça s’est produit
l’été dernier.
Aconteceu em um dia de 
verão do ano passado.