If you though the last poem was bad...

I'm in the moon, but not in Usagi,
I'm in Mars, but not in Rei,
I'm in every minute,
But you'll never see me in a hundered years.
What am I?

Winners: Luna424, Sailor Z, Mikaela1, Honeysweet, ~Angel~, and Dom Meyer.
Answer: (highlight to see) The letter M.
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