Most teenage boys have enough trouble just dealing with the pressures of school and dating, but 15-year-old Aoi Mitsukuni's life becomes exponentially more complicated when his mom returns from a long "business trip." He discovers that not only is his beautiful mother actually an alien, but she's the notorious Space Pirate Mito to boot! To make matters worse, the girl Aoi likes at school is actually a secret Galactic Patrol agent attempting to find and arrest his mother. No one ever said being a teenager in love was easy!

Aoi is in denial of the fact that his mom looks like a little kid and tries to avoid her. Meanwhile, Mito is determined to get him to acknowledge her as his mother.

It’s the local Firefly Festival and Mito wants to go on a mother-son date, but Aoi would rather hang out with a certain blonde girl he has his eye on.

Mito tells Aoi the story of how she crash landed on Earth and fell in love with his father.

The Nenga siblings decide to use Aoi in order to get to Mito, but will Mutsuki’s feelings for Aoi get in the way?

The Galactic Patrol is heads to Earth to find and arrest Mito. Meanwhile back on Earth, Masatsuki carries out his own plans to capture Aoi and deliver him to Ranban.

With Aoi in his clutches, Ranban reveals the truth behind his connection to Mito. Meanwhile, against the pleas of her crew, Mito agrees to turn herself in exchange for Aoi's freedom.

Masatsuki discovers that his dream job in the Special Forces isn’t living up to his expectations. Meanwhile, Ranban confronts Mito about their shared history.

It’s an all-out battle in Amanohara as Ranban’s forces face off with Mito’s pirates. Meanwhile, Aoi is trying to reach his mom without being captured by the Nenga siblings.

Tired of waiting, Ranban decides to spearhead the search for Aoi himself.

Mito and Ranban face off and the true source of Ranban’s power is revealed.

Ranban decides to destroy the Earth. Can Mito and Aoi stop him in time?