Foolhardy police officer Brian Nightraider is dismissed from the force for a history of reckless behavior that ultimately resulted in his partner's death. While wallowing in self-pity, the disgraced officer receives a curious invitation from the United Nations Immigration Bureau Special Investigation Unit. He has been recruited to join the Marginal Service, a secret underground branch of the UN tasked with handling Borderlanders. Indistinguishable from humans, Borderlanders are aliens that peacefully coexist in society. But now, a Borderlander terrorist organization has emerged, manufacturing and distributing a potent drug called Confu. With the Borderlanders' ability to regenerate and blend in as humans, uncovering the drug-trafficking ring will be no easy undertaking. However, the ragtag group at the Marginal Service are not one to back down from a challenge—even as their work exposes some unexpected figures as Borderlanders.

On a sunny day, Mihoshi Kuramitsu decides to take a peaceful nap while everyone else does chores. Sick of Mihoshi's laziness, Aeka Jurai Masaki questions her capability as a Galaxy Police Officer. Her pride wounded, Mihoshi decides to prove that she is a skilled first class detective by telling the story of how she and her partner, Kiyone Makibi, put a stop to a series of thefts involving Ultra Energy Matter. To make it more fun, Mihoshi inserts Tenchi Masaki and the others into her story. However, her fantastical tale may just demonstrate her lack of a grip on reality rather than showcase her accomplishment as a talented officer.

Mature grade school student Arisu Tachibana is an aspiring idol who receives an invitation from her company president to participate in the Third Entertainment Section—a new idol project. Arisu and eight other young girls soon meet their producer before beginning idol-related activities. To the girls' surprise, their producer appears to be a childlike adult and nothing like what they had imagined. The producer, who is taking on the position for the first time, also had no idea that he would be meeting a group of short, young idols. The awkward situation leaves Arisu disappointed, and she wishes for a producer change. However, the producer, with his genuine love for idols and his desire to see them shine, will not let this opportunity pass and expresses that he is serious about working with the girls. Thankfully, the young idols accept the producer after seeing his unwavering passion for idols, serving as the start of their journey to the stage of dreams.

After surviving a brutal terrorist attack on Plant Quetta, Suletta Mercury returns to dueling at the Asticassia School of Technology, while Miorine Rembran sits at her injured father's side, waiting to see if he will recover. As the residents of Earth House are preoccupied with their respective troubles, two members of Dawn of Fold—the perpetrators of the attack—secretly infiltrate the school, putting Suletta and her friends at risk. At the same time, Prospera, Suletta's mother, approaches Miorine to propose the continuation of "Quiet Zero"—a project headed by Miorine's father that can allegedly end all war. Prospera seems to be another political figure with hidden, opposing motives, and whether she truly has Suletta's well-being at heart remains to be seen.