come full circle
US /kʌm fʊl ˈsɜːrkl/
UK /kʌm fʊl ˈsɜːrkl/

1.
一周回って元に戻る, 振り出しに戻る
to return to a previous position or situation, having completed a full cycle or journey
:
•
After years of traveling, he finally decided to come full circle and move back to his hometown.
長年の旅の後、彼はついに一周回って故郷に戻ることを決めた。
•
It seems that fashion trends always come full circle, with styles from decades ago becoming popular again.
ファッションのトレンドは常に一周回って、何十年も前のスタイルが再び人気になるようだ。