Technically, this is from Sho's point of view about what he did to Kyoko.
I shouldn't have touched you.
Tainting you with my own hands.
The innocent smile,
Has now been replaced.
A demure mask in its place.
The pureness,
Has gone.
Now it is very unjust.
The heart has turned icy.
The thoughts evil and fearful.
From the angel I once knew,
To the devil I don't want.
I shouldn't have,
Tainted your mind, soul, or pureness.
An angel,
Has fallen.