Alien 9: Emulators
エイリアン9-エミュレイターズ
Prequel
Alien Nine
Alien 9· エイリアン9
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In the future, alien invasion is a daily occurrence and everyone must be prepared. Elementary School #9 has assigned three students to fight off the extra-terrestrial threat.
Sequel
Alien 9 Special
エイリアン９スペシャル
A short special released in the Champion Red magazine during 2003 about Yuri and Monami.
Sequel
Alien Nine Next
Alien 9 Next· エイリアン9ネクスト
The next instalment of Alien 9. Published by the original mangaka as a doujin.