Why M ?

[kawaii otaku]

it's just supposed to be short for 'Maria', if i'm correct.

M stands for Maria (Maria is the Japanese name for Mary Magdalene, if i'm correct)

[ImpactBreaker]

Originally Posted by kawaii otaku

(Maria is the Japanese name for Mary Magdalene, if i'm correct)

I think they often use 聖母マリア or just マリア for short, as reference to Virgin Mary.

http://www.animenewsnetwork.com/ency...me.php?id=3772

If japanese refer to Mary Magdalene they most likely often use her full name:
マグダラのマリア

I could be wrong though.

[Zeke.]

Yep, I read that the original title was BLISS. It was listed as so on a few CD sites but then it was changed.