The Maid's Devoted Phantom Duke

Hart Bolton, the legendary first duke of House Bolton, has haunted his estate for over a century as a ghost. For the last five years, he's watched over Dolly Lopez, the head housemaid. When Hart wishes they could be together forever, fate grants his desire unexpectedly. After the current duke is poisoned at a ball, Hart awakens in his body. Now possessing the same face but a different soul, Hart must navigate this second chance at life while hiding his true identity from the woman he loves, who assumes his sudden interest is merely a passing whim.

Original Webtoon:
AC.QQ, BiliBili, KuaiKan

Official Translations:
English: Manta, Tapas, Tappytoon, Webcomics, Webnovel
Others: Japanese