expression
to be frank with you; to tell you the truth; I'm going to lay my cards on the table
Set phrase used as a preface when revealing something personal or surprising. Often followed by a confession or honest statement.
何を隠そう、実は私も同じ失敗をしたことがあるんです。
To tell you the truth, I've actually made the same mistake myself.
何を
To be frank with you, he's been a huge cat lover for a long time.