The Melody of Oblivion

Bocca Serenade, is unhappy with his high school life. He wants to become a warrior like the ones from the story told to him by Tsunagi.

Bocca has become a Meros Warrior, and Tsunagi gives the young warrior his own Aibar machine.

After starting their adventure, Bokka and Sayako arrive in a town called "Bakuyagou", or "White Night Cape", where the sun never rises, making it a perfect place for tourist attractions.

Bocca finally learns that the robot creature he fought before was from the organization, Monster Union, who use robot creatures as weapons.

Although knowing the problems of White Night Cape, Bocca continues to try and destroy the Monster Union robot creature.

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.

Bocca learns that Tone is the girl who aimed an arrow at him. Good thing is, she appears to hate Melos Warriors. Surprisingly, he also learns that the technique that she uses is a Melos technique.

Eichi finishes the mural on the dam's wall. He then tells Tone that the rest will be left to them before he leaves.

Bocca and Sayoko arrive 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 meets up with his old friend Tsunagi. Tsunagi tells Bocca about the Space Fort named Mitranome, and about 'Engine One'.

Bocca and the team successfully save Sayoko. Sayoko reveals to them that there are still people in Engine One. Will they save them in time?

Continuing search for Kurofune, Bocca and Sayoko find Kurofune's Aibar machine, "Jaguar of the Sun". The Aibar machine reveals to them that Kurofune is on a mysterious island.

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 meets with Kei in the illusionary bus. They share thoughts about their dreams, and Bocca reveals his feelings for Sayoko.

Bocca and Sayoko arrive at a tourist spot along a canal. Sayoko's investigation of the area reveals that several tourists have gone missing there.

With Sayako and Toune trapped in the castle of Lucky Thoroughbred, Bocca and Koko sneak inside to rescue them. While on the way in, the two get more than a bit comfortable with each other, and Coco tells her story to the boy.

Tone and Sayako are held hostage in the tower. And Coco and Bocca have gone in to rescue them.

Sayako receives a message to return home. However, curious about her relationship with Bocca, she seeks to find out more.

The kidnapped prime minister is interrogated by the Armed Theatrical Group. The prime minister reveals his intended deal with the Monster Union.

After Coco finally meets her father, the warriors must defeat Electric Sheep.

The Meros warriors are on the Mahoroba and on a course to Mitranome.

The battle in the Mitranome continues.

The Vinderlize intends to destroy the Mitranome.

Bocca returns to Earth and finally meets the Monster King.