Nazo! Nazo? Happiness!!

 is the third single released by Milky Holmes.

Single Information
''Nazo! Nazo? Happiness!! was used as the opening theme for season 2 of the anime Tantei Opera Milky Holmes''.

Tracklist

 * 1) Nazo! Nazo? Happiness!! (ナゾ!ナゾ?Happiness!!)
 * 2) Hyper Milky Hour (はいぱーみるきぃあわー)
 * 3) Nazo! Nazo? Happiness!! (ナゾ!ナゾ?Happiness!!) (Off Vocal)
 * 4) Hyper Milky Hour (はいぱーみるきぃあわー) (Off Vocal)