Stay awake all night Webtoon
Complete | Anjeo | 2000 released
FL is a demi-God, her father was the King of the Grim Reapers while her mother was a normal human being. Without knowing any of this, she became an orphan after her mother died. She eventually meets and falls in love with a Grim Reaper who's the son of the new King of the Grim Reapers and meets her brother, who's also a Grim Reaper. Since she's a demi-God the brother aimed to kill her at first, but the two of them eventually treat each other as siblings.
The Blood Of Madam Giselle