Half-human hybrid Nanami makes a desperate ploy to prevent the villain from infecting every human being on Earth with Scylla cells.

The villain's backstory is finally revealed, while sibling rivals Kazuhiko and Aki come up with a way for the group to escape the space station.

Space Station Aries is a popular sightseeing destination as well as a training ground for military cadets. Newly-minted cadets and childhood friends Ryouta and Nao gets news of a sudden visitor.

As the remnants of Space Station Aries fall to Earth, some survive and some make the ultimate sacrifice.

The terrorists make a concerted effort to break into the holdouts' stronghold, but "super-soldier" Shuuhei leads the others in a risky defense.

Space Station Aries undergoes an emergency evacuation as terrorists on a shuttle arrive and hack into the station.

Ninja maid Tsurara goes undercover at Naeka's school to get close to her, but has a hard time pulling it off.

Shuuhei confronts the traitor and learns what the terrorists are truly after.

Kogarashi absconds with Naeka to a mountain in Kyoto to make her train for an upcoming kendo bout against her worst nightmare, Arayashiki.

Naeka becomes the caregiver when an ill-fated stab at dieting leaves her other bodyguard-maid, Fubuki, with a terrible cold.

Recent half-Japanese returnee Liz hates Naeka and her huge breasts and is in love with her mesmerizing big brother Hendrick, but she's the only one who can stop him from taking over the school.

Naeka goes undercover at a cake shop featuring large-breasted waitresses to help her relatively meager-breasted friends from losing their jobs at a rival cake shop that's likely to go under.

Naeka competes against Liz and Arayashiki at a secret shrine, hoping to please the local deity in order to make her wish of becoming good at math come true.

Shuuhei has transformed into an unkillable Perfect Scylla, but is held captive by the true enemy.

Kogarashi follows the trail of Naeka's stolen panties to her school.