Alchemy of Souls (2022)

amazing chemistry between the main leads. Fantasy+ historical (both are costume dramas), they both have strong female leads. There is power struggle in both dramas. In both dramas the main couple is willing to sacrifice themselves for each other. In both dramas a close family member of the fl is killed and she wants revenge. In both darmas the ml is the son of a king. In both dramas the romance is developing not that slowly but not that quickly as well.

Set in a fictional country called Daeho that does not exist in history or on maps, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies. It follows the story of an elite assassin named Naksu, whose soul is accidentally trapped inside the weak body of Mu Deok—Jang Uk's servant from a powerful and noble mage family in the country. The young master of the Jang Family, Jang Uk, holds a dark secret about his scandalous birth. He wants the formidable assassin to help change his destiny.

Set in a fictional country called Daeho that does not exist in history or on maps, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies. It follows the story of an elite assassin named Naksu, whose soul is accidentally trapped inside the weak body of Mu Deok—Jang Uk's servant from a powerful and noble mage family in the country. The young master of the Jang Family, Jang Uk, holds a dark secret about his scandalous birth. He wants the formidable assassin to help change his destiny.

Set in a fictional country called Daeho that does not exist in history or on maps, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies. It follows the story of an elite assassin named Naksu, whose soul is accidentally trapped inside the weak body of Mu Deok—Jang Uk's servant from a powerful and noble mage family in the country. The young master of the Jang Family, Jang Uk, holds a dark secret about his scandalous birth. He wants the formidable assassin to help change his destiny.

Same visuals in joseon era
There is an alchemy of souls also with two personalities who inhabit the body of the lead hand
The costumes are similar
Several romances and stories of crossed revenge

Alchemy of Souls reminds me of the Chinese drama Ashes of Love.
The plot is not similar, but I enjoyed watching the progression of the love between the leads. This is something you could watch in between waiting for AoS new episodes since it has many episodes (63).

A love story between the half-human and half-vampire Seon Woo Hyul, who was unable to become human due to a one-day difference over 100 years, and Joo In Hae, a woman who has no humane side and finds true warmth.

Set in a fictional country called Daeho that does not exist in history or on maps, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies. It follows the story of an elite assassin named Naksu, whose soul is accidentally trapped inside the weak body of Mu Deok—Jang Uk's servant from a powerful and noble mage family in the country. The young master of the Jang Family, Jang Uk, holds a dark secret about his scandalous birth. He wants the formidable assassin to help change his destiny.

both of the main characters are badass in their own ways, its historical its about revenge with martial arts

Set in a fictional country called Daeho that does not exist in history or on maps, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies. It follows the story of an elite assassin named Naksu, whose soul is accidentally trapped inside the weak body of Mu Deok—Jang Uk's servant from a powerful and noble mage family in the country. The young master of the Jang Family, Jang Uk, holds a dark secret about his scandalous birth. He wants the formidable assassin to help change his destiny.

In both Fake Princess and Alchemy of Souls, both the FLs work for High ranking families( in Fake Princess, for Crown Prince in Alchemy for Royal family Mages)
Similarities:-
1. Female leads are replacements to the original characters
2. Both come from a village backdrop/ country
3. Both possess fighting skills( In Fake Princess FL being a Mountain Bandit & in Alchemy FL being a Trained Assasin)
4. FLs are smarter than MLs
5.Both FLs have birth secrets
6.Both involve the FLs hiding their secret identity

Differences:-
1.Alchemy is more about magical, mystical elements (like WUXIA) while Fake Princess is a light hearted Rom-Com
2. AoS has a second ML( major SLS alert) unlike Fake Princess
3. In Fake princess, ML fights his brother for the throne unlike AoS

In both of the story the ml is weak at first and will become strongest among the mages/counters
Great teamwork and friendship+ you will get Yoo Jun-sang (park Jin) here too ?(kind of same father figure and one of the strong character, he's friend of ml's father too )
Both ml grew up without parents
Both storyline follow hunting evil soul or soul shifters and the soul shifters/evil souls feeds on human soul
TUC doesn't have much romance and more action based show and set up in modern times
Though it can't beat AOS in storyline, production and fantacy, TUC is still entertaining in its own way
Yoo In-Soo is in the 2ns season and a silly counter friend of ml
If you enjoyed AOS hope you will enjoy TUC too

both rely on energy and sensing energy
both have a core of energy
both have a master/teacher and pupil
both about wicked spirits and destroying them

Set in a fictional country called Daeho that does not exist in history or on maps, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies. It follows the story of an elite assassin named Naksu, whose soul is accidentally trapped inside the weak body of Mu Deok—Jang Uk's servant from a powerful and noble mage family in the country. The young master of the Jang Family, Jang Uk, holds a dark secret about his scandalous birth. He wants the formidable assassin to help change his destiny.

Set in a fictional country called Daeho that does not exist in history or on maps, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies. It follows the story of an elite assassin named Naksu, whose soul is accidentally trapped inside the weak body of Mu Deok—Jang Uk's servant from a powerful and noble mage family in the country. The young master of the Jang Family, Jang Uk, holds a dark secret about his scandalous birth. He wants the formidable assassin to help change his destiny.