に何の関係がある

what does it have to do with you?

→ に
phrase Rare #40,703
what does it have to do with you? Often used rhetorically or confrontationally to ask why something concerns someone.
JA: それが君に何の関係があるの?
EN: What does that have to do with you?

お前に何の関係がある?

What does it have to do with you?

— マルコムX (1992)

私に何の関係がある?

What does it have to do with me?

— レベッカ (1940)

君に何の関係があるんだ?

What does it have to do with you?

— オープン・ユア・アイズ (1997)