Both are mini dramas in which the FL is betrayed by the man she loves.
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Both are mini dramas in which the FL is betrayed by the man she loves.
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Both are mini dramas in which the FL is betrayed by the man she loves.
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Both are mini dramas in which the FL is betrayed by the man she loves.
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Both are mini dramas in which the FL is betrayed by the man she loves.
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Both are mini dramas in which the FL is betrayed by the man she loves.
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Both are mini dramas in which the FL is betrayed by the man she loves who cheats on her with her best friend.

Both are mini dramas in which the FL is betrayed by the man she loves.
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Both are set in school and focus on two students with very different goals/interests who become close.

Both are set in school and focus on two students with very different goals/interests who become close.

Both are historical fantasy movies in which the ML strays into the mysterious world of the afterlife and falls in love with the non-human FL.

Both are xianxia dramas in which the FL has a powerful identity that no one, including her, is aware of. Both FLs are very close to their only sibling (twin sister vs. younger brother) and they are students. Both MLs are not human and according to the rules of what they are aren't supposed to show emotions or aren't supposed to care about the FL. One of the leads has killed the other in their past lives. Both dramas have a similar feel.