Since childhood, 15-year-old Umika Konohoshi has been fascinated by aliens, hoping to one day voyage to outer space and befriend them. Unfortunately, this fixation has caused her peers to label her as odd, intensifying her struggle with severe social anxiety. Nevertheless, Umika's passion for the extraterrestrial persists, and she deeply believes that her true purpose is outside the confines of Earth. On her first day of high school, Umika's wish of meeting an alien seems to have finally come true when she encounters Yuu Akeuchi—a classmate who claims to have crash-landed on Earth with no recollections of her past. Umika tries to seize this opportunity to make friends with Yuu, but her lack of confidence hinders her. Sensing Umika's distress, Yuu suddenly uses a strange power to delve deep into her mind, thus sparking a friendship that may just help Umika reach her dreams.

Wataru Sajou is infamous in his school for persistently seeking the attention of his crush, Aika Natsukawa. His usual day revolves around shadowing her and confessing his undying love at every turn. However, a moment of epiphany leads Wataru to relinquish his childish behavior and face the reality that she will never return his one-sided feelings. He distances himself from Aika and spends his newfound spare time with his friends and in the company of other lovely girls. As Wataru moves on, Aika starts approaching him in unusually suggestive ways—making him question whether giving up on his love was the right decision after all.

Four members of the Din Republic's spy team Lamplight embark on a mission to capture an enemy spy. Although they struggle to work together due to their clashing personalities, Thea, Monika, Erna, and Annett complete their objective. While enjoying a short break, the four girls encounter a woman named Matilda, who claims to be Annett's mother. As they get to know Matilda, the team is dragged into an escalating conflict that tests their teamwork and allegiances. Meanwhile, the remaining Lamplight members notice that the dispatched squad has yet to report back. Worried about their allies, Klaus and Lily set out on an emergency expedition to locate their missing teammates. As the two uncover troubling information about rising tensions in the area where their friends last were, they must act quickly to reassemble the team before the mission reaches the point of no return.