Episode 9 My Nation Underground.

In the last 6 months, there have been many wiring and construction boomers working in the pedestrian subway that disappeared. Mason shows his interest in the missing boomer cases and is trying to hide the truth by blocking the news to the media. Sylia also notices it and feels there is something strange going on underground. Meanwhile, Leon, who now knows that Nene is Priss's friend, tries to get some information about Priss from her. Nene is amused by the way Leon is trying to get information about Priss and is planning to match them up. But Nene recklessly tells Sylia about it while teaching Macky how to use the computer. Sylia becomes furious when she finds out that Leon is a member of the AD Police and tells Nene "If you don't understand what you are doing here, I'll have to ask you to leave. You will only hinder us if you stay!" Nene, berated by Sylia sits in the corner of the room even as she is informed about a mad boomer showing up on the street. Linna is worried about Nene and tries to ask Sylia about what happened, but Sylia coldly says to leave her alone. The 3 knight Sabers launch, but Nene is eager to try to prove she can be some help and ignores the rest of the team by attacking the boomer by herself. She even interferes with Priss's role of destroying the boomer's core. The mad boomer reacts more violently to the Knight Sabers attack and quickly captures Nene. Suddenly, the ground beneath the mad boomer's feet collapses and a giant creature emerges from the ground. The Giant Creature uses its tentacles to grab the mad boomer and starts eating it in front of the stunned Knight Sabers and AD Police.

Episode 10 Woke Up With A Monster

More AD Police arrive late and shine spotlights on the giant creature. The creature tries to hide from the light and escapes back underground again. The next day, Leon is angry because the AD Police are ordered to stop searching for the creature, so he confronts his chief, Nick Roland. Since the creature is not a boomer, the AD Police can't take any action against it. That reasoning does not convince Leon so he plans on going underground with Daley to investigate on their own.
Priss visits the Silky Doll and suggests to Sylia that Nene should be removed from the front line. However, Sylia regrets how she treated Nene the day before and offers a bet with Priss that if Nene makes another mistake in the next battle, she will remove her as Priss suggests. But, if Nene performs better than Priss, Priss has to complete one request from Sylia. Priss accepts the bet feeling that Nene couldn't possibly out perform her. Leon and Daley manage to find the creature but are attacked by it. The Knight Sabers arrive just in time to save them. Unfortunately, Priss and Linna's attacks don't working on the creature and it catches them. Sylia realizes what this creature is by the shockwave it release to incapacitate boomers. She notices that the creature is a mutant from an old boomer research project and she rushes out to help. She is also hit by the shockwave. It is Nene who finds the weak point of the creature to save them in this crisis. A few days later, Priss who has lost the bet shows up in a very feminine dress, which Sylia chose, in front of everybody as they all tease her.

Episode 11 Sheer Heart Attack

Linna is notified of a mad boomer, which has shown up during her overtime working hours. She rushes to the location on her scooter but Priss destroys the mad boomer with Nene just as she arrives. Linna finds herself standing in the middle of the crowd watching as Priss and Nene leave with some complex feelings. The next day, Linna visits Nigel's bike shop when Priss is there. Linna tells Priss that she is going back to her hometown in Kumamoto Prefecture for a while. Linna's parents and relatives are gathering in her home for special occasion welcome her home. That night, as Linna is sitting on the porch to relax, her mother sits down with her and asks her to stay for another day for a arranged marriage meeting. Linna didn't expect this request, but accepts it for her mother's sake. Linna arrives unwillingly at the restaurant, but when she sees the handsome date her parents have chosen, Masaki, she blushes. Masaki and Linna go out for a walk after the lunch. Linna tells Masaki that she has found what she really want to do in Tokyo but for some reason, she can't find her foothold there.
Meanwhile, a military boomer as big as a building shows up in the middle of Tokyo. Nene contacts Linna but Linna is in Kumamoto, on top of that, she has lost her confidence in being a Knight Saber, she hesitates…

Episode.12 Made in Japan

The giant boomer appears in the streets of the Military Defense Department. AD Police are ordered not to do anything by headquarters. The Military Defense Department is trying to solve the problem by themselves and send out another of the same model boomer to fight with the mad boomer. But the mad boomers are getting more violent each offense. Priss has to fight all alone because Linna is in Kumamoto and Nene is unable to leave her operator position at AD Police HQ. Priss can't destroy mad boomer because she can't find the core, the MDD won't open the military boomer's design specs to anyone. Nene sends a virus into MDD's server and extracts the confidential files. At the same time, Priss' Hardsuit runs out of power. Linna shows up just in time and installs a new battery in Priss' Hardsuit and they destroy the giant boomer. That night, everybody gets together at Silky Doll and Sylia asks Linna about her home. Linna answers "My home is here!"
Nene starts to show some affection for Macky and searches for the Stingray family information online. She finds a 10-year-old picture of a young Sylia standing beside Macky who looks the same as he does now.