ここだけの話だが。
ここだけの話だよ。
I'm telling you this confidentially.
いや、こっちの話です
Between ourselves, he looks a little suspicious.
But, of course, you know best.
This is the plain, unvarnished tale.
It is a common case―the old story―the old, old story.
This is a plain statement―a straightforward story―an unvarnished tale.
According to all accounts; it seems to be so.