In the year 2020, a nation faces the pervasive threat of the "Others"—mysterious monsters who fall from the sky and feed on human brains. At the same time, psionics, a hormone that gives certain people extrasensory abilities that are effective against the Others, is discovered in the human body. Subsequently, the nation's founder establishes the Other Suppression Force (OSF) to combat these monsters and save humanity. Commonly referred to as the Scarlet Guardians, young individuals with psionics undergo intensive training to join this group. One day, the nation prepares an induction ceremony for the exceptional recruits who completed the grueling training to become Scarlet Guardians. Among these young elites is Yuito Sumeragi, the determined son of the nation's founder; at the age of five, he was rescued by a woman in the OSF. To repay this debt, he joins the organization, eager to put his training to good use. As he meets his new comrades, he faces a big problem—the woman who saved him years ago closely resembles one of his teammates. However, this should be the least of his worries—unbeknownst to him, a conspiracy is brewing, one with the capability to shake the entire country.

Suletta Mercury leaves her planet and enters the Asticassia School of Technology at the behest of her mother. There, right and wrong are determined through duels between students, and the top-ranking duelist will receive Miorine Rembran as their fiancée—this prize being decided by Miorine's father. When Guel Jeturk, the best pilot in school and Miorine's current fiancé, demands that his betrothed move in with him, Suletta disapproves, so Guel challenges her. Although she emerges as champion, Suletta is subsequently detained on suspicion of piloting a forbidden type of mobile suit—a GUND-ARM, or "Gundam"—which results in her victory being voided. Miorine refuses to accept any more injustices and proposes another duel with even higher stakes. Now, Suletta must triumph a second time, otherwise she will be expelled and the Gundam Aerial that means so much to her will be destroyed.

As another year begins at Yuigaoka Girls' High School, ushering in a fresh batch of students, the school idol club Liella! is excited to expand their membership. However, Liella! is extremely popular due to the astounding talent they have continuously displayed; thus, new students lack the courage to even consider approaching the club, fearing the rigorous training that might lie ahead. Amid her worries, club leader and co-founder Kanon Shibuya meets first-year student Kinako Sakurakouji and tells her about the world of school idols. This leaves Kinako in awe, but being fairly average herself, she feels she would not be capable of matching the spirited performances of the brilliant Liella! members. Nonetheless, Kinako receives encouragement to join the group and comes to share their dream of reaching for the stars once again in the grand Love Live! Competition.

Second season of Saihate no Paladin.