Trinity Seven The Novel: Night Episode & Lost Memory

Night Episode to Lost Memory is the first volume of a spin-off light novel series written by Kenji Saito and illustrated by Nao Akinari adapting their Trinity Seven: 7-Nin no Mahoutsukai. The volume was released on November 8, 2014.

Synopsis
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Prologue
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Chapter 1: Pajama Party
''Suddenly finding himself isolated in a world covered in darkness, Arata Kasuga vaguely understands that he is seeing the end of the world. Frightened by the thought of possibly causing this, he desperately attempts to move forward....''

Abruptly waking up from his dream, Arata finds himself groping the chest of his friend Yui Kurata, who, along with Arin Kannazuki, snuck into his bed in their pajamas. Before he can happily return to sleeping, Lilith Asami swiftly barges into his room, accusing him of bringing Yui and Arin into his room again before becoming embarrased by the sight of him still touching Yui's chest. Attempting to appease her, Arata apologizes for not inviting her first, causing her to become even more flustered while Yui and Arin continue to cling to him. Arata then asks her to join them, prompting her to reject his request and throw her hat at his face.

Later, Lilith has Yui and Arin kneel in front of her as discipline, although the two still don't quite understand her vexation. However, Arata defends them and claims they were helping him as he was suffering from his nightmare. Yui mentions that he was groaning and even sweating in his sleep when she arrived, while Arin also remarks that she felt a wicked surge of magical power as well. As such, they happily gave him their magical power to ease his discomfort, which he gratefully thanks them for. Lilith also initially believes them, before realizing that they would only have known his condition if they had originally intended to sneak into his room, which they easily admit much to her chagrin. While she continues to scold them, Arata recalls that he has been having nightmares more often and wonders the reason is because he is becoming closer to the Magic King, as well as the chancse of the nightmares becoming reality.

Suddenly, the group hears Levi Kazama's voice calling to them from the ceiling, only for Levi and Selina Sherlock to reveal themselves in their sleeping attires from another bed. After Arata praises Levi for her ventriliquism, Selina reveals that they had been hiding since sneaking into his room along with the others. Before Lilith can scold them as well, Levi is able to skillfully direct her attention to Arata's nightmare by verifying that he was really experiencing discomfort in his sleep, distracting her from the fact that girls were sneaking into a boy's room. Lilith then notes that dreams can sometimes be warnings of one's magic going out of control or being affected by something else, leading Arata to ask the girls if they experienced the same as well.

Arin also reveals that she too had a nightmare, causing her to seek Arata and ask Yui for help, again much to Lilith's exasperation. As a way to help Arata deal with his unstable magic, Levi then proposes that they recount their own experiences, which Lilith agrees to help as an extracurricular activity. Although, everyone else sees this moment as an opportunity for a slumber party with Selina, having anticipating the ocassions, unveiling drinks and snacks despite Lilith's objections. Arin begins to tell her story by recalling that she recently obtaining her spear as well as being around the time her husband became an inspector...

Chapter 2: Breakup Girl & Lance of Create
''Remembering her first memory being enveloped in darkness, as Arin becomes aware of herself, she is suddenly able to perceive the world around her. While unable to remember her situation or even who she is, the sensation of first experiencing the world caused her to unexpectedly cry.''

After describing her first memory, Arin continues to recall that she wandered around in an unkown location until she met Biblia's headmaster, much to everyone's surprise. Lilith then speculates whether or not Arin also originally came from another world like her, which causes Arin to add that the headmaster had suddenly appeared in front of her and told her that he had come to pick her up. Lilith subsequently comments that while the headmaster had always been suspicious, but those words sounded very dangerous, which everyone unanimously agrees, particularly Arin who notes to herself that she was eight at that time.

Arin further reveals that although this happened several years ago, the headmaster had not changed since then. Levi agrees with her and suggests that magus of his rank probably had an immortality spell, while Arata also recalls that Liber's headmaster had the appearance of a child as well. Selina then asks if the headmaster brought her to Biblia, which Arin confrims, but additionally mentions that weird monsters often attacked them though. This causes Yui to remember that unkown monsters that couldn't be analyzed would sometimes outside Biblia which Arin states as the cause being her leaving the Academy grounds. She further explains that creatures previously never seen before would appear when she left the Academy area. She also mentions that while some of the monsters were easily defeated, they were forced to flee for others as well. This information surprises Selina who asks if the headmaster, a Paladin mage, also ran, which Arin verifies as he was the one who suggested to depart.

Levi then comments that they must have been an "Another One", astonishing Arin by her level of knowledge and resourefulness as she only recently came to learn of them as well. Arin affirms Levi's statement, praising Levi while also wondering about the potential danger she could become to Arata. Afterwards, Arata asks about about the "Another One" and if they were some sort of fans of her. Arin replies that they were similar, but would no longer appear around her anymore. While Arata is relieved, Lilith queries for the reason which Arin responds by showing her grimoire, Laguna Yggdrasil, and indicates she went to the World Tree Library located in Laguna where she received her spear as she continues her story.

''Around the time Arata was assigned as an inspector and headed towards the Royal Liber Academy, Arin was spending her time researching her grimoire. Worried about her husband becoming closer to the Magic King as he continued to grow stronger, she hopes to find a way to prevent his transformation or help him is such an event occurred. As a result, she eventually comes to the conclusion that she must return to the basics and learn more about herself by denying her grimoire. After pouring her Ruina magic into Laguna in ring form, Arin begins to experience intense pain as grimoires and their owners were basically one in body and soul. Soon, anable to resist the immense agony, she looses consciousness.''

''Upon awakening, Arin finds herself in an unfamiliar scene, inside a large tree, where she meets a female knight in green armor and wielding a strang spear who welcolms her to the World Tree Library. Arin quickly recognizes the name and is surprised by its existense. The World Tree Library is a divine location which contains all knowledge of runes and supposedly disappeared at the Ragnorak. Her knowledges causes the knight to commend Arin of her familiarity, as well as her willingness to destroy her own magical power to reach the truth. Arin only replies that she needed to acquire power and holds out her hand for the knight's spear that she recognizes the Demon Spear Gae Bolg which would enhance her Chaotic Rune magic. Asked by Arin if she was Scatach, the founder of Chaotic Runes, the knight denies this and explains that she was merely an alter ego bound to the Library, unaware of Scatach's current status.''

''The knight next asks Arin for the reason of her desire for power that she was willing to even destroy her grimoire, which Arin responds with Arata as the two then prepare for battle. Understanding that she must prove her resolve first to receive the spear, they both connect to the Ira Archive. As both users of Chatoric Rune, the victor would be decided by their affinity, however Arin is quite confident in her experience. Arin begins by invoking a spell through a rune, but the knight cancels the spell by calling the same rune as well. Arin tries a couple more times nwith different runes, including a specially remodeled one but the knight continues to call the same to cancel all of her spells. Eventually, the knight uses an "Othala" rune which will return a target to their "homeland." In Arin's case, this will send her to the world of darkness she previously remembered. Desperate, Arin calls the same rune, but does not affect the knight as her "homeland" is the Library. Realizing that she cannot win, she places the Othala rune on herself, shedding tears while wishing to remain with Arata and her friends. ''

''However, instead a new rune appears and forms into Arin's new Thema Partum, while a surprised Scatach's Alter Ego who comments about Arin's humanity. Proclaiming that Arin passed the trial, the Alter Ego disappears into a light into the spear. Thanking the Alter Ego, Arin grabs the spear, shedding a single tear as light envelops the library...''

After Arin finishes her story, Arata displays some concern for her which makes her happy, as well as suggest creating a baby, much to Lilith's embarrassment. Nevertheless, Arata notices that Arin is able to smile naturally as she is content being with everyone.

Chapter 3: Outlaw Prosecutor & Eudaemonics
Due to the noise and light, Mira and Akio arrive at Arata's room to investigate before eventually joining them. But shortly after, Lieselotte suddenly appears above Arata, landing on top and straddling him on his bed. As a result, this causes Yui and Arin to move onto the bed as well, much to Lilith and Mira's dismay. Akio attempts to incite Mira to join also which she immediately refuses. However, Levi slyly hugs Mira and uses her ninja art to swith places with Arata. Embarrassed by their unexpected positions, Mira slaps him out of reflex.

Afterwards, Arata bemoans the fact that he is punished for doing nothing as he teases Mira, who is feeling apologetic for her overreaction. Akio and Lieselotte comment that MIra has become more light hearted while she feels the same way towards them as well. Arata then recalls the three worked together as inspectors before and asks to hear about their previous work. Complying with his request, Mira begins to recall a previous incident in a certain city...

''Due to a rumour of a Breakdown Phenomenon, as well as the disappearance of three mages probing the reports initially, Mira, Akio & Lieselotte arrive in a car at a rural city in America after teleporting from the Academy. Despite seeming tranquil, all three find the city unusual and desolate, particularly Akio due to the resemblance of her destroyed hometown. Regardless, the group decides to go to their hotel and rest for an hour before beginning their investigation. ''

''Beginning their investigation afterwards, Mira assigns the three different parts of the city to explore. Akio, in particular, volunteers to look into an area with the church in order to ease Mira's workload, much to her gratitude. However, their inspection do not yield any results of magic powers or the prior missing mages. However, Mira, having learned that the mages disappeared on their first day, decides that they should turn in for the night, believing that the perpetrator of the Breakdown Phenomenon will attempt something at that time which Akio and Lieselotte both obliges.''

''Later at midnight, the trio are attacked in their hotel room by the staff who's appearances now resembling corpses. Having expected something to occur, the girls are prepared and able to defend themselves against the onslaught. Akio is also able to recognize the source of the event as the result of a Breakdown Phenomenon from her Gula Archive, much to Lieselotte's displeasure. Furthermore, they discover that at midnight, a barrier forms around the city which causes the locals to become living corpses. Attempting to locate the source of the Breakdown Phenomenon, Mira activates her Gehenna Scope to pinpoint the mastermind's location while Akio and Lieselotte easily disposes of any opposing enemies to protect her. Much to their surprise, her analysis reveals that the heart of the phenomenon was located in the deserted church Akio had previously investigated. After defeating the living corpses, they begin heading over to the abandoned church undisturbed.''



''Arriving at the church in the middle of the city, the inspectors, particularly Akio, are surprised to see the building fully restored with a white light shining from the interior. Unable to sense any presence inside, they enter the church to find a sister praying inside whom Akio quickly deems as the source of the Breakdown Phenomenon. Upon further inspection, the trio discover that the sister is already dead, perpetuated by a magic spell to continue praying for the townspeople's happiness even after passing away. Thus causing the departed inhabitants of the city to revive during the day, then revert to their original rotting appearance during the night. Using her Gehenna Scope magic to analyse the sister's Thema Felicitas, Mira then calls upon her grimoire to vanquish the deceased sister and finally end the curse.''

''After the subjugation of the sister, the city and people returns to their original desolate and deteriorated appearances. After pondering the sister's original motivations, as well as discussing the concept of happiness, the trio begin their trip back home for their next assignment, watching the sun rise as they leave the ruined city.''

Characters

 * Arata Kasuga
 * Yui Kurata
 * Arin Kannazuki
 * Lilith Asami
 * Levi Kazama
 * Selina Sherlock
 * Mira Yamana
 * Akio Fudo
 * Lieselotte Sherlock

Continuity

 * Arata's habit of grabbing something upon waking up, most often a girl's chest if one is nearby, was previously demonstrated in Chapter 1 where he accidentally groped Hijiri (posed by Sora) after awakening.
 * Arata's comment of Arin and Yui previously sneaking into his bed nude occurred in Chapter 10.
 * As Arin begins to tell her story, she makes several references to previous events:
 * Her "recently obtaining her spear" refers to her Demon Spear Gae Bolg which she first gained in Chapter 24.
 * Her husband becoming an inspector alludes to Chapter 19 when Biblia's headmaster assigned him the second seat of Grimoire Security to help investigate the destruction of the Royal Liber Academy.
 * Lilith's speculation of Arin's origin being similar to hers is a reference to the revelation that Lilith was originally born in a different world and transported by her father, Abyss Trinity, to the current world. This was first revealed in Chapter 33.
 * Arata recalls that Lieselotte was also a part of Grimoire Security before her disappearance prior to his enrollment in the Royal Biblia Academy.
 * Akio's past as a Spriggan, as well as the destruction of her hometown, is mentioned during Mira's recollection of a past Grimoire Security assignment.