Shidou hat sein Date mit Kotori in einem Aquapark, aber Touka ist auch mit dabei.
Shido is contemplating the situation regarding Kotori involving the events five years prior including the statements made by her and Origami about the apartment fire. While he meets with Reine to discuss the details regarding the date with Kotori, Origami is informed about high-tech gear coming into the base in two days by Ryouko while she visits Origami in the hospital. Ratatoskr's headquarter's personnel have all agreed that going to Ocean Park with Kotori is the ideal venue for Shido's date so Shido undergoes a training session outlined by Reine to prepare involving Shido taking Tohka and Yoshino to buy swimsuits. As Tohka asks about a swimsuit, Origami appears and teases her about it being a new piece of anti-Spirit equipment but reveals that her true motive for joining them is to inquire of Tohka about the Spirit of Flames to the point of politely being courteous in her questioning. Finding Tohka's information useless, Origami pressures Shido into giving his opinions on her choice of swimsuit. Tohka and Origami turn it into a battle in that whoever turns on Shido more gets to go on a date with him. Yoshino ultimately wins but back on Fraxinus, Shido watches the video of the fire from five years ago. Recognizing ordinary video noise as an actual person initiates a series of flashbacks that lead to Shido blacking out. During Kotori's date the next day, Tohka and Yoshino tag along to help Kotori ease up and be able to partake of the actual events. As Shido sees Kotori resorting to pharmaceuticals to counteract her deteriorating mental condition, his determination is invigorated so he goes about the date with just him and Kotori. At the AST base, Origami gets a firsthand view of the DW-029 Annihilator Gear codenamed “White Licorice” sent there by DEM Industries for use by Mana. In talking with Ryouko, she's indirectly told that they have footage of the battle between Kotori and Kurumi. In the last scene, Origami is staring at a frame from the footage showing Ko
琴里に残された時間、琴里が琴里でいられる時間はあと2日……。
幼き頃から連れ添った妹に対して士道の取るべき行動は『デートしてデレさせろ！』
士道は琴里を、最愛の妹を救えるのか！？
華やぐ街中、色とりどりの水着、その更衣室で士道は究極の選択を迫られる！
코토리의 영력을 봉인하기 위한 데이트가 실내수영장에서 시작된다.
그런데 겸사겸사 따라온 토오카와 요시노는 매우 즐거워 하지만, 정작 코토리는 심드렁한 분위기.
그리고 시도는 우연히 코토리와 레이네의 대화를 듣게 된다.
Shido está contemplando la situación con respecto a Kotori que involucra los eventos cinco años antes, incluidas las declaraciones hechas por ella y Origami sobre el incendio del departamento. Mientras se reúne con Reine para discutir los detalles sobre la fecha con Kotori, Origami es informada sobre el equipo de alta tecnología que ingresa a la base en dos días por Ryouko mientras visita a Origami en el hospital.
Shido deve andare ad un appuntamento con Kotori, e il posto designato è un parco acquatico. Ma prima come allenamento, accompagna Tohka e Yoshino a comprare un costume.
