Alchemy of Souls Season 2: Light and Shadow

Both are fantasy and Rom-com genres. Both have a similar theme about a soul ending up in a different body.

Taner tries to commit suicide and when she wakes she finds that there is another soul in her body. Xiao tan's soul entered Qu Taner's body. In the end, Qu Taner left the body for Xiao Tan.

On the eve of her 19th birthday, Mizuki is grappling with a recent family tragedy, a cheating boyfriend, and a betrayal by her best friend. In despair, she flees to a dilapidated estate where she encounters Adam, a mysterious figure playing a familiar melody. Drawn to him and the house, Mizuki uncovers a haunting connection. As the full moon approaches, her boyfriend and a few schoolchildren work to unravel the dark secret from 19 years ago and save Mizuki.

- FL & ML helping each other
In both dramas, the main leads are helping each other in finding the truth, bringing justice, and planning revenge.

- hidden past and identities
In both dramas, characters have hidden pasts/identities, and they are trying to find the truth.

-smart main leads
Both dramas have characters who have depth, are intelligent, and are working towards their goals.

-romance
The romance isn't overshadowing the plot at all. There are sweet and lovely moments between the leads, but the plot doesn't stray away from the mystery, revenge, etc.

University student K is an ordinary young woman, but, one day, she finds herself in her favorite romance novel set during historical times. She has now become the minor character Cha Seon Chaek. She is the daughter of a wealthy noble family and her dream is to have a peaceful and normal life. Cha Seon Chaek, while possessed by K, then spends one night with Lee Beon, the lead male character in the novel.

He comes from a royal lineage and is favored by the King. Lee Beon has a cold-blooded personality and is gifted with an attractive appearance and outstanding martial arts skills. He has also experienced a heartbreaking past. Somehow, Lee Beon and Cha Seon Chaek happen to meet and talk. Lee Beon is consoled by her about his heartbreaking past. They spend the night together. Soon, Cha Seon Chaek tries to connect Lee Beon to Cho Eun Ae, who is the lead female character in the novel. According to the novel, Lee Beon and Jo Eun Ae are supposed to fall in love, but, due to the appearance of Cha Seon Chaek, Cho Eun Ae's fate has changed. No matter how hard Cha Seon Chaek tries, Lee Beon’s love always finds its way back to her.

Other people around them include Jung Su Gyeom and Do Hwa Sun. Jung Su Gyeom is a young officer from a prestigious family. He is Lee Beon’s only friend. Do Hwa Sun is an ambitious woman whose life goal is to marry Lee Beon and become a member of the royal family.

Both are high fantasy genre Korean dramas written by Hong Sisters. Hotel Del Luna is modern, AoS is historical fantasy. FLs are used to be assassins before.

Both are historical dramas situated with fantasy;
Both have moon/sun archetype;
Amnesia female lead with unhinged male lead;

Fantasy and supernatural themes, Complex world building, Romantic Subplots, Strong characters, Royalty and Power, Visual aesthetic and cinematic style, Strong female leads.
The blend of magic, destiny, romance, and world-building makes both dramas particularly engaging.

- K-dramas
- Good swordmanship
- Beautifully shot and well acted
- Many characters
- The plots themselves probably won't have much in common.

In both shows the leads are socially awkward outcasts. They also idolize their popular love interest.

Jang Uk returns from death, and three years later, the story of the mages unfolds anew. Jang Uk becomes a hunter of the soul-shifters when a young woman, a prisoner in her own home, seeks his help to reclaim her freedom.