Squid Girl decides that the Lemon should test their defenses against other invaders. But little do they know Squid Girl has other plans for this mock invasion...

A fight breaks out between Squid Girl and Eiko and this time things aren’t patching up as quickly.  With the tension in the air Chizuru closes the restaurant early so the group can go to the local Festival.  Will Squid Girl go back to the sea or will a mysterious visitor be the key.
Squiddie, you look so cute in that yukata!
Kalmärchen, du bist so schnuckelig in diesem Yukata.
¡Calamarcita se ve tan linda en ese yukata!
¡Calamarcita está muy guapa con ese yukata!
Calmarine en yukata…
Ika-chan, você está tão fofa neste yukata!