Come to think of it, you once said that

In Kivotos, a teacher and student having a romantic relationship is not a crime!

That's all you wanted to say?

Is it completely wrong... or deliberate...

...That's what I mean.

...Will you understand if I don't tell you...?

"That's all I have to say" means that's all I have to say

I guess you were trying to say something else, weren't you?