Squid Girl (2010)

S2E2 Won't You Go to Elementary School!? / Won't You Cosplay!? / Aren't you Lighter!?

Squid Girl tags along with Takeru to his elementary school, where the teacher grows envious of her instant popularity with the students. When a group of bullies seizes control of the playground, Squid Girl boldly challenges them to a soccer match—a tough task without her tentacles. Meanwhile, Eiko dresses Nagisa in male attire to draw in female customers, which conveniently silences Squid Girl's teasing. Ayumi returns to work in a maid outfit with a metal knuckle to mask her shyness, but her father soon points out these gimmicks don't address the real problems. Later, Eiko and Chizuru discover Squid Girl can alter her weight at will, sparking bizarre experiments.