Nae Namjuneun Bukbuheukbaldaegong
내 남주는 북부흑발대공
The protagonist believed they died in a car accident but instead found themselves reborn as the companion of the Northern Duke’s heir. The heir is frequently ill and fated to lose the princess to another. Determined to change this, the protagonist resolves to help the heir become the ideal Dark-Haired Northern Duke and win the princess’s heart. However, as they spend time with the heir, they begin to question their ability to follow through with the plan.
