<p>After the abduction of his brother Kotaro by the Machine Empire, Teppei Takamiya joins forces with X, one of several highly-advanced, artificially intelligent machines known as B'ts (pronounced 'beat'), to rescue him. <br/> <br/>Volume Subtitles: <br/>1: **X Revival!** (エックス復活!, Ekkusu Fukkatsu!) <br/>2: **Far Way to the Area** (エリアへの遠い道, Eria e no Tōi Michi)<br/>3: **Heart Color** (心の色, Kokoro no Iro) <br/>4: **Five Color Phosphorescence** (五色の燐光, Goshiki no Rinkō)<br/>5: **The Seven Greatest Demons** (最凶の七魔将, Sai Kyō no Nana Ma Shō)<br/>6: **Fragment of the Sun** (太陽のかけら, Taiyōnokakera)<br/>7: **Song of an Angel** (天使の詩, Tenshi no Uta - ALT ENG. Angel's Poem) <br/>8: **Forest of Oblivion** (忘却の森, Bōkyaku no Mori) <br/>9: **Nightmare Battlefield** (悪夢の戦場, Akumu no Senjō) <br/>10: **Blood Battle! Kamui Island** (血戦！神居島, Kessen! Kamui-Jima) <br/>11: **Area Collapse** (エリア崩壊, Eria Hōkai)<br/>12: **Shellfish** (貝えぬもの, Kai Enu Mono) <br/>13: **Deathmatch of Intelligence** (智力の死闘, Chiryoku no Shitō) <br/>14: **Faithfulness** (信しる心, Shin Shiru Kokoro)<br/>15: **Hurry Light!** (光よ急げ!, Hikari yo Isoge!) <br/>16: <too blurry to make out> <br/><br/>Note: Volume count based on the bunkoban. <br/><br/>Link: <br/>[AnimeNewsNetwork](https://www.animenewsnetwork.com/encyclopedia/anime.php?id=527) (anime)</p>
