"I don't want to be a burden to you for the rest of your life. Would you let me be your ghost?" - Yun Xuan
The wish of a ghost, the desire of one who becomes a ghost: when all is said and done, I only want to protect you as best I can, and stay with you forever.
Strong female lead, awkward and tsundere male lead (adorable in his past life), one-on-one happy ending, and both leads are each other's first and only.
Other creatures also make appearances.
Ninety degrees below zero sightseeing group???