The Melody of Oblivion
S01E13: Kurofune
In this labyrinth, where space and time can be curved or warped, Bocca is able to meet with the child sacrifice, Solo, as well as Kurofune. Bocca witnesses the battle between Horu and Kurofune that happened in the past. Horu was defeated but was able to survive by hiding in the labyrinth because of the warped time. Bocca parted ways with Kurofune and later got separated from Solo, so he wanders off by himself in the labyrinth.
Overview
After a war occurred in the 20th century between humans and demons. Since that time, the monsters rule the world in fear but keep relatively hidden from public view. A boy named Bokka ponders the past and wonders what became of the Meros Warriors who defended the world so bravely against the demons.
Episodes
Bocca Serenade, is unhappy with his high school life. And wants to become a warrior like the ones from the story told to him by Tsunagi.
S01E02 The Beginning of a Long School Break
Bocca has become a Meros Warrior, and Tsunagi gives the young warrior his own Aibar machine. Left with more questions than answers when Tsunagi abandons him, Bocca once again encounters the pickpocket, Sayako. And the...
S01E03 White Night Cape
After going on their journey, Bokka and Sayako arrive in a town called "Bakuyagou", or "White Night Cape", where it's always dark, and morning never rises, making it a perfect place for tourist attractions. It...
S01E04 Monster Union
Bocca finally learns that the robot creature he fought before was from the organization, Monster Union, who are humans who serve under the monsters, using the robot creatures as their weapons.Keiko Hamasaki, the sister of...
S01E05 The Voice Reaching Out to You
Although knowing the problems of White Night Cape, Bocca continues to try and destroy the Monster Union robot creature. Everyone in the town knows of his intentions, and sends Bocca into jail. Sayako finds out...
S01E06 Pyramid Scheme Valley
While following Kurofune, Bocca and Sayako encounter a dead end, but finds 'Nezumikoukoku', or 'Pyramid Scheme Valley', and also find a dam with a mural of a tear on it. The duo goes to it,...
S01E07 Meigen
Bocca learns that the girl who had aimed her arrow at him is named Tone. And she appears to hate Melos Warriors. He also learns that the technique that she uses to drive the "working...
S01E08 The Fated Road Afar
Eichi completes the mural on the dam's wall, he tells Tone that the rest will be left to them before he leaves. Miri under the orders of the Monster, rides her 'Rat Monster' for a...
S01E09 Apeman Turn
Bocca and Sayoko arrives at a huge industrial region. Sayoko befriends a strange girl by the name of Coco. Coco tells Sayoko that she is involved in a theatrical play nearby. Bocca and Sayoko later...
S01E10 Unicorn Series
Bocca meets up with his old friend Tsunagi. Tsunagi tells to Bocca about the Space Fort named Mitranome, and about 'Engine One'. The team intends to destroy Engine One, but Bocca wants to save Sayoko...
S01E11 A Song You Still Don't Know About
Bocca and the team successfully saves Sayoko. Sayoko reveals to them that there are still people in Engine One. They decide to try and save them too. The Monster Union member is later defeated in...
S01E12 Maze Island
In Bocca and Sayoko continuing search for Kurofune, they find Kurofune's Aibar machine, "Jaguar of the Sun". The Aibar machine reveals to them that Kurofune is on a very strange island. They try to make...
S01E13 Kurofune
In this labyrinth, where space and time can be curved or warped, Bocca is able to meet with the child sacrifice, Solo, as well as Kurofune. Bocca witnesses the battle between Horu and Kurofune that...
S01E14 The Entrance called the Exit
Bocca meets with Kei in the illusionary bus. They share thoughts about their dreams, and Bocca reveals his feelings for Sayoko. He learns that Kei and all the rest of the children that Horu, the...
S01E15 Fortune River
Bocca and Sayoko arrives at a tourist spot. Sayoko's investigation into the place reveals that several tourists have gone missing there. They spot the body of Tone's Aibar machine, Skyblue, the blue eyed boy, lying...
S01E16 Sayoko
With Sayako and Toune trapped in the castle of Lucky Thoroughbred, Bocca and Koko sneak in to save both. While on the way in, the two get more than a bit comfortable with each other,...
S01E17 Having wings even though one is not an angel
Tone and Sayako are held hostage in the tower. And Coco and Bocca have gone in to rescue them. However, Shuuma has explosives planted all over the castle and he will not hesitate to set...
S01E18 Tokyo Station
Sayako receives a message to return home. But she wants to know where her relationship with Bocca is going first. The Armed Theatrical Group arrives to search for 'Engine Two'.
S01E19 The War of the 20th Century
The kidnapped prime minister is interrogated by the Armed Theatrical Group. The prime minister reveals his intended deal with the Monster Union. He also mentions about his lost daughter. The origin of the new Monster...
S01E20 The Sun Is Calling Out To You
Coco meets her dad finally. The warriors must defeat Electric Sheep. And Bocca and Sayako may have to split.
S01E21 Area out of Range
The Meros warriors are on the Mahoroba and on a course to Mitranome. But the space port is guarded by the monster union and they intend to stop them.
S01E22 Mithranome
A new unicorn series is discovered in the ship, but he is not on the side of the Meros Warriors. The battle in the Mitranome goes on.
S01E23 Like an Arrow that Pierced Through the World
The Vinderlize intends to destroy the Mitranome. Child Dragon utilises a weapon that can immobilise the Aibar Machines. And the secret of Project Silent is revealed.
S01E24 And yet, the dawn of you who begins a journey
Bocca returns to Earth and finally meets the Monster King. The Monster King reveals the secret about the Melody of Oblivion.
Cast

Masumi Asano
小夜子 / Sayoko Tsukinomori

Sanae Kobayashi
遠音 / Toune Requiem

Mamiko Noto
忘却の旋律 / The Melody of Oblivion

Houko Kuwashima
ボッカ / Bocca Serenade

Kouki Harasawa
ニック / Nick

Ken Yamaguchi
チャイルドどらごん / Child Dragon

Mitsuru Miyamoto
黒船・バラード / Kurofune Ballad

Issei Miyazaki
ヒカリ / Hikari

Daisuke Namikawa
クロン / Kuron

Mami Kosuge
たまころがし / Tamakorogashi

Showtaro Morikubo
ホル / Horu

Soichiro Hoshi
スカイブルー / Skyblue