On the day Tōma Kamijō and Index see Academy City's space elevator, Endymion in the distance, they meet a Level 0 girl with an amazing singing voice, Arisa Meigo. As the three enjoy their time together after school, magic-user Stiyl Magnus suddenly attacks them. His target: Arisa. Why would a girl from the science side be targeted by someone from the magic side, Tōma wonders. In the chaos of Stiyl's attack, he tells Tōma, Index and Arisa that she might cause a war between the magic side and the science side.
The now 50 year old Scientific Boys Club decides to build a ship with which they plan to sail to Mars on the "Ethereal Current", curious to see if there is life on Mars.
Increasingly disturbed by the dark energies building within him, Ryu is confronted by Shun, a boy claiming to be the brother he never knew. But before Ryu can consider whether Shun's timely appearance might be more than coincidental, Shun is kidnapped by Shadowlaw. To recover Shun, Ryu must undertake the ultimate journey of self-discovery and learn to control the power threatening to consume him.
The land of Zer’lue is in turmoil, ravaged by the technological might of Chairman Sana'ku and his evil, militaristic Zul’earth forces. In a rapidly unfolding story of treachery, deceit and betrayal, only one boy holds the power to defeat such overwhelming odds... a boy named Lue'der, who possesses a mysterious red eye and the ability to control the power of the wind itself. With the fate of the world at stake, Lue'der must learn to unlock his legendary power and battle against the evil which threatens to engulf his planet.
