Originally hatched from Cosmic Tama-chan, the badges are able to download "Type-2 Gear" onto the wearer, which consists of a red band uniform and a double-ended baton.
In the manga, there is an extra chapter that supposedly takes place in an alternate future ten years later where under Rikushiro, they activate the barrier and Mao-chan misses her mark.
After talking with a sympathetic Misora, her toy tank Mi-Kun arrives to pick Mao up due to a giant cute alien about to land in Yokohama, Kanagawa Prefecture.
It's Mao's 8th birthday and her grandfather, Rikushiro Onigawara (Ground Defense Force's Chief of Staff), gives her a mysterious green, clover-shaped badge that had been confiscated from aliens.
Sensing the purity in her heart, the badge activates, blowing off the side of their house and reveals Mao in her Type-2 Ground Gear outfit.
The Chief of Staff suddenly asks her to do a favor for him, which she immediately agrees to without even hearing what it is—and ends up regretting her decision when she finds out that she has to be the new homeroom teacher of Mao-chan's class.
Combining their batons, they unleash an energy shockwave that Yuriko refers to as the "Light of Kusanagi," to what Chinami replies is impossible since Mao and Misora are full-blooded earthlings.
Kagome gives a private lecture to both the Ground and Air Defense Force's Chiefs of Staff and their granddaughters about the origin of the alien invaders.
Two years prior, the female members of the Ground Defense Force established contact with a cute alien, Cosmic Tama-chan, who they protected and took care of.
However, the badge had already been claimed by the Sea Defense Force's Chief of Staff, Adalbert Von Marayuma, which was given to his granddaughter, Silvia Maruyama.
Mao, Misora and Sylvia finish their cleaning assignment of sweeping leaves when they suddenly notice a cat that's cornered Jirocho against a tree.
Meanwhile, Kagome finishes grading her student's math problems with lightning speed and rushes off back to headquarters to see the Chief of Staff, but halts at the sight of Mao-chan in her Type-2 Ground Gear.
She starts to finally enjoy a day of relaxation and eat some ramen when Mao, Misora and Sylvia pay her a sympathy visit.
Kagome suggests that they begin creating a strategy for countermeasures to protect the landmarks, but the Chiefs of Staff have another issue on their minds... Their granddaughters out-of-season sports competition.
The sports meet begins with a televised broadcast, the Chiefs of Staff as guests of honor, a tired Kagome and an introduction by the Prime Minister (who had skipped the Japan/US summit).
The episode begins with the United Defense Forces failing to stop the giant sheep alien from stealing more Japanese landmarks.
Angry of the alien's cockiness, Rikushiro sends out the United Defense Forces to the target location, the stone lion in Okinawa.
As the giant, cute alien arrives (this time a sea serpent), the girls are half-drowzy and seem to be in no condition to defend, yet they transform into their Type-2 Gear anyway while Chinami and Yuriko spy on them.
To Chinami's chagrin, Mao, Misora and Sylvia finally manage to complete the United Defense Barrier with no problems in their sleepy state.
Kagome finally manages to trap the alien within security barriers, but one of the operators (named Mayumi) catches a glimpse of it and sways under its bewitching influence, releasing it from its captivity.
Rikushiro had anticipated this and had the Ground Defense Force's chief engineer, Toko, create a new warning system that could detect cute aliens faster than anything else in Japan.
As the students fawn over Kiku-chan, the new member of the Defense Forces immediately starts barking, sensing a cute alien nearby...
Sylvia makes a remark that this alien is "rather ugly" which enrages the crab and begins chasing the girls, eventually trapping them in suds as well.
Ironically, as Sylvia says all this, Chinami and Yuriko are experiencing exactly what she describes, meeting up with their alien, a black bear with a white muzzle, and getting lost in the snowstorm.
Events coincidentally happen to the two as the girls of the Defense Forces describe the dangers of being trapped in a snowstorm, such as almost falling asleep, taking shelter in a cave and keeping each other warm with body heat.
She greets the three girls with a kiss on the cheek, making Mao and Misora blush (and the Chiefs of Staff pucker up until Kagome gives them a stern glare and asks what the three grown men are thinking).
Carol manages to catch Mao in midair and now understands that defending Japan doesn't necessarily mean using brute force.
The building destroyed, the suitor fleeing and the marriage certificates incinerated, Rikushiro apologizes to Kagome and says that they should probably forget the whole thing ever happened.
Mao, Misora and Sylvia begin to download their Type-2 Gear, but Kagome interrupts them, reminding the girls that they can only use their powers in DEFENSE, never to initiate attacks.
Hayate, Misora and Sylvia soon arrive afterwards in their Type-2 Gear, who were given permission by Sorajiro and Adalbert (who also appear) to protect Mao-chan's smile, thereby still defending and not going against the Defense Forces' code.