March 13, 2015
A hero show is performed on the beach for the kids, though the performers run into a bit of trouble when Squid Girl somehow manages to get everyone to cheer for the villain. When she then takes the costume for herself, Chizuru acts as a guest character to set her straight. Later, Eiko is shocked to find Squid Girl is able to solve complex math problems. She reluctantly asks her to teach her how to study, only to find the technique is illegible to humans. After Gorō rescues her from drowning, Nagisa becomes concerned that he may have been brainwashed into thinking Squid Girl is not a threat, leading to some strange misunderstandings.