The series begins with a spatial quake devastating the center of Eurasia. Thirty years have passed since the spatial quake, and the ditzy Kotori Itsuka and her adopted older brother Shidō live in Tengū City, Japan. For the opening ceremony, Kotori and Shido make a promise to meet at a diner later that day. As school ends for Shido, a spatial quake alarm sounds throughout the city for the citizens to enter shelter areas immediately. After being unable to contact his sister, Shido uses his GPS to
Shido is undergoing stage two of his training which is practical application upon real humans. First is his teacher Tamae Okamine who, with the assistance of Reine Murasame and Kotori, falls head over heels in obsessive love with him. Running away from her, he bumps into Origami. He uses her for practice but ends up unintentionally starting a relationship with her. A spatial quake alarm occurs and the "Princess" Spirit is expected to appear at Raizen High School. With the students evacuated and
Following the incident at Raizen High School, Shido and Tohka are on their date being overseen and supported by the Fraxinus crew. Tohka mistakenly assumes that each variety of food she is consuming at first is a "date". Not accustomed to a crowd, when the couple enter the shopping area she assumes that humanity is launching an all-out attack on her. Origami observes them from the shadows while Shido and Tohka go from a high-priced restaurant to south of the station where they enter an improvise
Tohka has transferred into Shido's class, where she and Origami immediately started a rivalry. Shido meets Yoshino for the first time while running through a shrine on a rainy, ill-forecast day. Believing her to be just a girl, he goes on about his way. At school, Tohka has made cookies and competes with Origami for Shido's attention. Arriving home, Shido learns that Tohka will be living in his house since he has sealed her powers. Kotori explains that it is also training as Shido still has to a
Tohka is avoiding Shido due to her feelings about what happened between him and Yoshino. She talks with Reine and receives advice and clarity about what occurred. During this time, Shido helps Yoshino look for her puppet, Yoshinon. Yoshino gets hungry while searching so the two go to Shido's house to eat. It's revealed that Yoshinon is Yoshino's friend because he is essentially a hero that is everything Yoshino wants to be. As Shido is getting close to Yoshino, Tohka barges is spouting an apolog
Tohka and Yoshino decides to visit hot spring. So Shido makes the arrangement for them to go to Tenguu Gokuraku Hot Springs. Perverted Kyōhei Kannazuki persuades Kotori to go too but has been exposed that he has ulterior motives. His punishment is to dig a hole and refill it for the next week. Meanwhile, Ryōko Kusakabe of the AST is informed that the DEM Corporation is going to send reinforcements. A hot headed Ryōko also finds out from her member that due to the increase in the Spirit's alert l
Mana is having a 10 vs. 1 practice match against Origami's unit before having introduced herself at the briefing AST's previous battle with Hermit where she unknowingly reveals herself to be Shido's biological sister. Kurumi Tokisaki transfers into Shido's class revealing herself to be a Spirit. During her time touring the school with Shido they're followed by Origami and Tohka, but as Shido attempting to seduce Kurumi she is also attempting to do get closer to him. Kurumi code-named "Nightmare"
Shido invites Kurumi out but is forced on a polygamous date when Tohka seduces him and Origami forces her plans upon him for a date. Shido is unable to deny any of them as Tohka would be heartbroken, Origami would be suspicious and his plans to seal Kurumi depend on the date. With their dates occurring around the same time and their entertainment venues located rather close to each other, Ratatoskr assists Shido by teleporting him to each girl's location while monitoring their emotional levels.
Mana kills Kurumi and explains everything to Shido. After he is forced away, he avoids Origami and Tohka after running into them because of seeing the death Kurumi caused. Tohka finds out the reason for Shido's behavior and continues her date with him to try to cheer him up. After gaining some insight to Kurumi, the next day Shido declares to Kurumi that he'll save her. Kurumi goes to the school rooftop while encasing the school in her field to dissuade Shido from trying to save her. Mana is con
After a short conversation, Kurumi used one of her skills to make Kotori stay still, create copies of herself, and shoot Kotori a few times. Kotori fell over after Kurumi's last shot but Kotori's healing skill enables her to not die. Then, the shocked Kurumi sent her copies to kill Shido but he was pushed away by Kotori and the copies were killed. In the heat of the fight, Kurumi inhibits Kotori but it only worked for a while. Kotori used her weapon to shoot Kurumi after the frightened Kurumi su
Shido is contemplating the situation regarding Kotori involving the five-year event including the statements made by her and Origami about the residential fire. With Ratatoskrs headquarters personnel all agreeing that Ocean Park is the ideal venue for Shido's date, he undergoes training outlined by Reine involving Shido, Tohka and Yoshino to buy swimsuits. As Tohka asks about a swimsuit, Origami teases her that it's a new piece of anti-Spirit equipment. Finally, she inquires of Tohka about Efree
A frightened Kotori is with Shido at the amusement park riding various roller coasters and attractions on their date. Without communications, Ratatoskr can only monitor with Kyōhei making masochistic comments to the opportunities Shido should have taken. While separated, Yoshino tells Tohka what she overheard about Kotori being a Spirit and how Shido is trying to seal her powers. Origami steals the "White Licorice" and suddenly attacks Kotori as she is talking to Shido. Kotori changes into her S