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

1.
코앞에, 눈앞에
in plain sight; in an obvious place, but often unnoticed
:
•
The keys were right under your nose the whole time.
열쇠는 내내 네 코앞에 있었어.
•
He didn't realize the answer was right under his nose.
그는 답이 바로 코앞에 있다는 것을 깨닫지 못했다.