When a gate to another world suddenly opens on Earth, Mikado City is invaded by strange creatures known as "Neighbors," malicious beings impervious to traditional weaponry. In response to their arrival, an organization called the Border Defense Agency has been established to combat the Neighbor menace through special weapons called "Triggers." Even though several years have passed after the gate first opened, Neighbors are still a threat and members of Border remain on guard to ensure the safety of the planet. Despite this delicate situation, members-in-training, such as Osamu Mikumo, are not permitted to use their Triggers outside of headquarters. But when the mysterious new student in his class is dragged into a forbidden area by bullies, they are attacked by Neighbors, and Osamu has no choice but to do what he believes is right. Much to his surprise, however, the transfer student Yuuma Kuga makes short work of the aliens, revealing that he is a humanoid Neighbor in disguise. [Written by MAL Rewrite]

Murasame Sumika is popular in the high school for her excellence in the marks and sports. However, she has a secret: she is in love with her classmate Kazama Ushio. Ushio also has a liking to the love between girls, but she hasn't noticed Sumika's feelings and has always been refused by other girls.

As she heads off to her entrance ceremony at Sainotama Girls' High School, Akane Kikuchi muses over her grade school dream of becoming a manga artist and the lack of progress that she has made. When she finally arrives at school, she is surprised to learn that she is once again in the same class as her two best friends: the deadpan and emotionless Shiori Saginomiya and the hyperactive and ridiculous Nozomu Tanaka. Tanaka then comes to the obvious realization that she can't achieve her grade school dream of being popular with the boys and getting a boyfriend by going to an all-girls high school. In desperation, she begins asking the girls in her class to introduce her to their guy friends. Her classmates, however, are anything but ordinary. From a grandmother-loving loli to a reclusive chuunibyou to an overly analytical stalker, each one is given a fitting nickname by Tanaka to accentuate their weirdness. And so begin the wasteful days of these high school girls, each day kicked off with a simple question: "Hey, wanna hear something amazing?" [Written by MAL Rewrite]

Tatara Fujita is a shy middle schooler who has no particular plan for the future. He has gotten through life by avoiding any kind of confrontation and blending in with the crowd. But blending in isn't enough to get out of trouble, as some bullies harass him for money. Luckily, he is saved by a man named Kaname Sengoku. Kaname invites Tatara to his dance studio. Although he would normally never set foot in such a place, Tatara is captivated by Sengoku's commanding presence. Granted an opportunity to dance with fellow classmate Shizuku Hanaoka—who often practices at the studio—Tatara realizes there's something about the idea of being put in the limelight and dancing where people will see him that keeps him coming back. With an earnest, passionate drive to improve, Tatara begins his journey into the world of competitive dance. [Written by MAL Rewrite]