In this third series based on the All Purpose Cultural Cat Girl Nuku Nuku finds herself in the midst of endless high school angst and at the same time must battle Mishima Heavy Industries as they create a series of dastardly plots! In this edition Ryunosuke Natsume the son of Kyusaku Natsume Nuku Nuku's creator tries to help Nuku Nuku acclimate to her new school. However he becomes distracted when Noriko Ishiyama's crush on him goes too far. At the same time he must deal with his mother who has an alternate evil identity!