under your nose
US /ˈʌndər jʊər noʊz/
UK /ˈʌndər jʊər noʊz/

1.
目の前に, すぐそこに
in plain sight; in an obvious place, but often unnoticed
:
•
The keys were right under your nose the whole time.
鍵はずっと目の前にあったんだよ。
•
He didn't realize the answer was right under his nose.
彼は答えがすぐ目の前にあることに気づかなかった。