archytele The Vault
Season guide

The Betrayal Knows My Name: Season 1

24 episodes Premiered Apr 11, 2010 Updated Sep 30, 2026
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Season 1 Episodes

Episode Guide

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Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

29%
71%
Mytharc (7): Crucial lore & season climaxes
Core (17): Character development & subplots
Side Quest (0): Standalone / filler
S1·E1 Mytharc

Moment, Get Going

Apr 11, 2010 · 24 min

Sakurai Yuki was abandoned by his mother and left in an orphanage, where he spent his childhood alone. Now, as a high school student, Yuki has recently begun to have several myster

S1·E2 Core

Tune of Eternity

Apr 18, 2010 · 24 min

Yuki meets a man who introduces himself as Takashiro Giou, who claims to be his older brother and asks him to come with him to Tokyo. Yuki is initially confused by the sudden revel

S1·E3 Core

Night of Walpurgis

Apr 25, 2010 · 24 min

Yuki is troubled after his meeting with Murasame Toko and Tsukumo and Giou Takashiro, head of a family with special powers known as the Giou Clan. Does Yuki belong with Takashiro o

S1·E4 Core

Days of Yesterday, A White Tomorow

May 2, 2010 · 24 min

While searching for the missing orphans, Yuki receives a call from his classmate Uzuki and heads to school, where he finds someone unexpected. Worried for Yuki, Tsukumo uses his po

S1·E5 Core

New Encounter

May 9, 2010 · 24 min

Having found his place among the Giou Clan, Yuki decides to travel to Tokyo with Luka and the Zweilt Guardians. On the way there, inexplicable feelings well up inside Yuki as Luka

S1·E6 Mytharc

The Boundary Between Light And Despair

May 16, 2010 · 24 min

In Tokyo, Yuki and Luka wait for Takashiro as he makes a stop at a police station. A girl is attacked by a man whose identity is revealed to be nothing more than a golem, holding t

S1·E7 Core

The Twilight Mansion

May 23, 2010 · 24 min

Yuki and the others finally make their arrival to the Twilight Mansion at dusk. Upon arrival they are greeted by Aya Kureha and Tachibana Giou, the steward and director of the mans

S1·E8 Core

Brand Zeise

May 30, 2010 · 24 min

After everyone had breakfast at the Twilight Mansion, Tachibana Giou leads Yuki along with the Zweilt Guardians to the Communal bath which happens to be occupied by Toko Murasame a

S1·E9 Core

Scar

Jun 6, 2010 · 24 min

Yuki notices a scar on Shusei’s chest and learns from Luka that some wounds—especially those inflicted by friends—cannot be healed. As Shusei’s condition worsens, the police inform

S1·E10 Mytharc

Cry of Despair

Jun 13, 2010 · 24 min

Takashiro orders the Zweilt not to look for Shusei as World's End is searching. Shusei wakes up in a strange place surrounded by the 8 missing high school boys. Ashley comes in and

S1·E11 Core

That Which is Fleeting, Strong and Precious

Jun 20, 2010 · 24 min

With Yuki's help, Tsukumo wakes up long enough to warn the others of Reiga. Yuki, Luka, and Hotsuma set off to find Ashley and Shusei while Takashiro handles things at the mansion

S1·E12 Core

To Be a «Pair»

Jun 27, 2010 · 24 min

Hotsuma fights Ashley, but can't keep up because of his injuries. Just as she's about to kill him, his shouts wake up Shusei who stabs Ashley. The two take her on with renewed stre

S1·E13 Core

The Irony of Fate

Jul 5, 2010 · 24 min

Yuki is shocked to see his childhood friend Kanata revealed as Reiga. While he struggles to accept that Reiga wants to kill him, the others rush to protect him. Shusei and Hotsuma

S1·E14 Mytharc

Bound By Contact

Jul 12, 2010 · 24 min

After the end of the brief confrontation with Reiga, Yuki sleeps for two full days due to the shock he received at knowing that his childhood friend Kanata was in fact, Reiga. Whil

S1·E15 Core

And Then Determination

Jul 19, 2010 · 24 min

Yuki is set to leave for the Kamakura residence with only Luka and Tachibana. Though the others wish to join him, they eventually give in to Takashiro’s order that only Yuki should

S1·E16 Core

Frozen Time

Jul 25, 2010 · 23 min

Takashiro invites Yuki to accompany him on a stroll through the gardens. Passing through a bamboo grove, Yuki feels a sense of nostalgia towards the place. When Takashiro winces in

S1·E17 Core

Sakura

Aug 1, 2010 · 23 min

Takashiro recounts the events that took place 1000 years ago, during the Heian period. The Giou clan was a well-known family who directly served the court and was led by 4 high-ran

S1·E18 Mytharc

A World Without You

Aug 8, 2010 · 23 min

Yuki decides to visit Luka and is assigned Senshiro and Kuroto as his bodyguards by Takashiro. At Yuki's prompting, Kuroto reveals that he and Senshiro owe Luka a great debt. Meanw

S1·E19 Core

The Vengeful Pair

Aug 15, 2010 · 23 min

Kuroto asks Yuki to play shogi with him, where Kuroto shares his past of how Senshiro becomes his second partner. Hotsuma and Shusei are summoned to the Kamakura residence.

S1·E20 Core

Sin and Punishment and Promise

Aug 22, 2010 · 23 min

Deeply concerned for his master Takashiro, Fuyutoki feels frustration with his inability to do anything but simply wait. Inspired by his words, Yuki disobeys Takashiro's orders and

S1·E21 Core

The Indelible Image

Aug 29, 2010 · 24 min

Reiga orders Cadenza to withdraw, binding him with summoner’s chains that Kuroto warns will burn if he resists. Cadenza notes that Reiga’s power is weakened by controlling two Gene

S1·E22 Core

To the Final Battle...

Sep 5, 2010 · 24 min

Reiga and Cadenza retreat to Infernus, granting everyone a temporary reprieve from battle. Having pushed the limits of his power, Yuki loses consciousness and collapses. Witnessing

S1·E23 Mytharc

The Battle of Traitors

Sep 12, 2010 · 24 min

Reiga kidnaps Yuki and uses him to lure Luka and the Zweilts into his territory. Takashiro discovers Reiga's whereabouts and sends Luka and the Zweilts to rescue him. Hyde is held

S1·E24 Mytharc

Connected Hearts

Sep 19, 2010 · 23 min

Reiga orders Luze, Luka's younger twin brother, to destroy everything that stands in their way, so Luze challenges Luka. During the fight of Luze and Luka, Takashiro breaks through

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