emeraldarrows

Both have a lead character (ML vs. FL) who has the ability to see ghosts.
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Both are horror/romance with a haunted FL.
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Both FLs are largely reclusive due to being able to see and living with ghosts.
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Both have the concept of a shadow or piece of a person who becomes their own unique person. Both have misunderstandings between the leads, with the FL having a wrong impression of the ML's feelings/actions for a large portion of the drama.

Both are mini dramas in which the FL is betrayed by the man she loves and in her revenge plot she becomes entangled with another man who assists her.

Both are mini dramas in which the FL is betrayed by the man she loves and in her revenge plot she becomes entangled with another man who assists her.

Both are mini dramas in which the FL is betrayed by her fiancée and embarks on a mission of revenge, causing her to become entangled with a man who assists her.

Both are mini dramas in which the FL is betrayed by the man she loves and in her revenge plot she becomes entangled with another man who assists her.

Both dramas begin with the FL dying, then finding herself alive and back in the past, using her knowledge of what will happen to change her fate.

Both are mini dramas in which the FL is betrayed and murdered, then finds herself alive back in the past, using her knowledge of what will happen to take revenge and stay alive.

Both are mini dramas centered around a revenge plot by the FL(s). Both FLs have knowledge of what will happen (through premonitions vs. time travel) and use it to their advantage. The MLs start out as sidekicks/assistants to the FL's revenge plot but have secrets of their own, and over time the two fall in love. Both dramas have a very similar feel and pacing.

Both are school set movies with a socially withdrawn/awkward FL and a popular ML with brightly colored hair. Both MLs have tragic backgrounds.