Ibeon Namjuneun Haegorimnida

Ethan, the heir to the throne of Hynt, the city of the dead, has done everything he can to become king, but he is unable to make the final connection to the living, and is left to wander the earth. Meanwhile, Mi-Ju, a medical student who is unhappy in her current life, receives an unexpected proposal for an arranged marriage. Just as she's wondering if this is the only way she'll ever be able to move on, she runs into Ethan in his skeleton form...! (Source: Manhwakyung, translated)