Alien Nine Next

Alien 9 Next
エイリアン9ネクスト

Prequel

manga

The girls have finally graduated 6th grade and are now in Junior High. There's a new girl in town and she seems to be hosting an entirely different kind of alien. (Source: Anime News Network)

Prequel

manga

A short special released in the Champion Red magazine during 2003 about Yuri and Monami.