Octopus Girl is made-up of a series of vignettes about the titular character Takako who is regularlybullied by her classmates. They take things too far one day and attempt to drown her, then force her to eat a live octopus, which she is allergic to. Both almost kill her. However, she wakes up that night with the body of an octopus but the head of a girl. She then brutally getsrevenge on the bullies. She later figures out how to control her transformations.