completely unrelated
それは君と全然関係ない。
That has absolutely nothing to do with you.
ちょっと全然関係ないこと聞いてもいい?
Can I ask you something completely unrelated?
ところが全然関係ないんだな
But it turns out it has nothing to do with it at all.
— High and Low (1963)
君には全然関係ないでしょ!
It's got nothing to do with you!