Renascence (2020)

Both dramas have the FL occupying another girl's body, and a royal ML with a stoic personality.
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One is the original story, the other a sequel movie about what happens to one of the characters after the events of the drama.

In both the FL's spirit is in another girl's body following death and there is a love triangle involving the FL, the ML, and the SML.

Both dramas have the FL in another girl's body and a royal ML who is initially cold towards but quickly entranced by the FL. Both MLs have an evil brother who desires the FL.

In both the FL dies and ends up in another girl's body.
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- The ML and SML both have a close relationship to each other
- The Emperor favours the FL and is jealous of the FL's relationship with her first love
- FL is smart/strong and conquers the imperial harem, fighting for justice

This drama is too similar to the legend of the phoenix, it's just that the stories are a little bit different. Although the marrying to the emperor to save the love of their life, and then being rude to them is the same. If you like dramas like this then this is for you! But sorry, just not my cup of tea. If you enjoyed Legend Of The Phoenix, this one is for you!