[Translation] "Letter" lyrics

[tenshi no hane]

Misa, I don't have time to translate the entire song right now, but I'd like to point out one thing about the 5th paragraph:

もしかしたらさ　シアワセなんて
ほんのひと握りしかなくて

I think you should read it as ほんの一握りしかなくて instead of 本の人握りしかなくて.
ほんの = mere; only; just
一握り = a handful of (something); a small amount

So it means something like "If we can only grab a mere handful of happiness"