The Natsume family moves back together in the Mishima Manson under the condition that Akiko takes on all the duties of a regular mother and wife. She discovers that because of all the work she has to do she hardly sees Ryunosuke any more than before, so she plots revenge on Kyusaku for 'tricking' her.

A new Mishima satellite weapon has accidently been set to kill Akiko, So she enlists the help to Nuku and Eimi to disable the satellite.