A Korean Odyssey (2017)

Soma Yui and Torino Naoki were childhood friends, but they met again as adults. Just as he decides to propose to Yui, Naoki suddenly disappears from Yui's sight after being embroiled in a mysterious incident. Naoki continues to wander in this world as a spirit without knowing that he has died. Naoki asks Uozumi Yuzuru, a detective who is the only one able to see Naoki, to convey his feelings to Yui, but Naoki ends up breaking up without properly saying "thank you, goodbye, and I love you" to the person he loves the most.

A woman gets a power to order around a powerful but mischievous deity she is bounded with by a tangled destiny.

Both have demons and the ML not being human. They both have the ML having to protect the FL, and the ML also needing the FL in regards to his own powers.

Ghosts and good chemistry between leads. There are a lot of little mysteries in A Korean Odyssey, whereas in The Ghost Bride there is one big mystery.

1- both stories cover these genres: Action, Suspense, Mystery, Romance, Sci-Fi, Fantasy, Melodrama.
2- the lead male and female fall in love unexpectedly.
3- an interesting enemy the comes unexpectedly in every part of the story.

Right after starting Guardian, it reminded me of this drama (fantasy-wise)

A Korean Odyssey is a lot more romantically based between male lead and female lead but both have a pretty solid fantasy background story and some good and some crappy CGI effects to show supernatural stuff.

This is a story involving vampires. It goes back to 350+ years when Baek Jung Won saved the vampire I Wha from being burned at the stake in his village. He fell off the cliff while they escaped and I Wha had to give him her blood in order to save him from dying and thus Baek Jung Won was transformed into a vampire also.
In the modern day Seoul, they opened a bar. One day, Baek Jung Won received a letter from his former lover who was dying and entrusted him to look after her daughter, Jang Ji Yun. Baek Jung Won fell in love with this woman some 20 years ago but broke up without telling her the truth about himself. After her mother's funeral, Jang Ji Yun found a picture that her mother treasured a lot with someone looking like Baek Jung Won in it and she set out to look for him. When she finally found him, she thought he was the son of her mother's long lost lover as Baek Jung Won's appearance didn't change as a vampire. They start to fall in love and I Wha has difficulty dealing with that. At the same time, a serial killer who sucks blood from the victims is on the loose

Both shows have the same light-hearted vibe, even though the leads have also faced some difficulties. In addition both shows:
> Showcase a hate to love / enemies to lover type of relationship.
> The FLs tended to keep people at bay due to a past trauma.
> There's a slight love triangle which, thankfully, gets abandoned.
> ML is extremely sweet towards the FL and almost acts like a different person.

Both are fantasy korean dramas written by famous screenwriter duo, Hong Sisters. A Korean Odyssey is a modern fantasy, AoS is a historical fantasy. Both dramas included special powers and great CGIs. Amazing casts and great chemistry.

Both dramas have a similar feel due to being fantasy based with the characters having inexplicable powers.

The drama series is based on classic Chinese novel “Journey to the West,” but reinterprets the story into the present day and has a romantic-fantasy twist.

Both dramas involve a supernatural/ fantasy aspect. There is a ghost in Chicago Typewriter and demons/ deities/ spirits in A Korean Odyssey. There are also a few scenes of the Japanese occupation in A Korean Odyssey. Both dramas also have a similar feeling and tone when you watch them.

Both female leads see supernatural beings. They also both involve possession. The dramas also have a good comedy aspect along with the romance.

This is another magical drama. Everything happens between life and death, enemies and friends. A couple also belonging to South Korean mythology. And the male protagonist at every sign of love suffers from deep pain. He who should kill her is the one who will give his life to save her.

Both are based on the tales of Journey to the West. The Journey to the west is closer to the original story and funnier. I also find the Sun Wo Kong here is more active like a monkey, funnier, smarter and real troublemaker than Hwayugi. If you really really like the tale Journey to the West and Sun Wo Kong, I really recommend you to watch this. Even though this drama is old, this is truly a masterpiece.

However, if you want more mellow and romance then choose Hwayugi.

I think both are good in different perspective.