Collection of 4 oneshots:

MP0 - Weekly Shounen Jump 3-4#, 2005
The oneshot that will lead to Mx0. The names are different but the contents are the same.

Shi Monkey (し〜もんき〜) - Weekly Shounen Jump Zoukan: Akamaru Jump Summer, 2004
A boy has come to a deserted island to meet his scientist father who is working on a top-secret experiment. There he meets a beautiful girl who knows him, but he doesn't know her.

Snow in the Dark - Weekly Shounen Jump Zoukan: Akamaru Jump Winter, 2004
A one-shot fairy tale which shares many elements of the traditional story of Snow White but is certainly unique and complex enough that it is more than just a reinterpretation.

Kirino Sako to Nakamatachi (桐野佐亜子と仲間たち) - Weekly Shounen Jump 19-20#, 2004
Original work: Taisuke Ninohara. With criminals who abuse the supernatural power "Revelation", the story of a private office that confronts this