ひとごと
with each person; with everyone
Also written 人毎
Adverb
人ひとごとだと思おもって。
That's only because you don't have to do it.
人ひとごとじゃないだろ。
Don't think it has nothing to do with you.
君きみはまるで人ひとごとみたいな顔かおをしているね。
You look as if it were none of your business.