Recommendations

If you liked watching Shining For One Thing, you can try watching Scripting Your Destiny. Though the two dramas have quite different plot and storyline, but both of them have some elements of fantasy and gives you the same vibe.
Both of these drams have the ML protecting FL without them knowing.
Moreover Scripting Your Destiny is a short drama, so it won't take you too much time to finish watching it.

Hope you enjoy watching!!

Both of these dramas are about celebrity life and the people around them. They show the people working in the industry and create a plotline given that premise. Both also feature a lot of cameos of famous personalities.

I was watching my gf is an alien after business proposal and realized some of the similarities like:
-Both male leads suffer from the rain and have a trauma linked to it
-Contract relationship between male and female leads
-Another male character likes the female (kind of a love triangle)
-Both males are rich CEO's and strong female leads works under them
-One male has a father while another has no parents
-The female lead helps solve the trauma (kind of)
-Happy endings
I think Business Proposal is more of a short, get-to-the-point than my gf is an alien.
Have a go, you might enjoy :)

tomorrow has a very similar feel to mystic pop-up bar.
both dramas follow a trio, both dramas are related to helping people's emotional troubles in a supernatural manner.
Female lead's goal in tomorrow is to help as many people through their memories to avoid getting sent to the underworld.
female lead's goal in mystic pop up bar is to resolve 100,000 grudes by entering their dreams to also avoid getting sent to hell.
All the characters in both tv shows are charming, and overall mystic pop-up bar is an enjoyable watch.

The similarity of the story is that they both FL has the ability to see spirits/ghosts. Both helps the wondering spirit’s to resolved and go back to their realm, but SYHH is more on a darker and serious side as for the MS are more towards ROM COM genre.

Romantic with obsession love story between FL a Japanese woman & ML a Korean man. This time is very rare to see collaboration movie/drama between other countries.

A romantic high school love story between ML a baseball player & FL an orchestra musician as they start to cheer & support each other for their dream & passion slowly they attracted to each other & fall in love. Takeuchi Ryoma soooo adorable.

Friendship between Korean woman & Japanese woman as they compete through ballet. Go Ah Ra as a Korean ballet dancer & Dong Bang Shin Ki/TVXQ/Tohoshinki as a singer & dancers. International artists work together is very rare to watch. Hiraoka Yuta is soooo adorable. If you like ballet or dance this movie is a passion & a dream.

Friendship between Korean woman & Japanese woman as they compete through ballet. Go Ah Ra as a Korean ballet dancer & Dong Bang Shin Ki/TVXQ/Tohoshinki as a singer & dancers. International artists work together is very rare to watch. Hiraoka Yuta is soooo adorable. If you like ballet

A romantic Christmas love story between ML Japanese man & FL Korean woman whom ML met in the past & now they meet again in the future during Christmas time in Tokyo. I like this 2nd lead couple than the main couple Aiba Masaki & Eikura Nana. Ikuta Toma & Han Hyo Joo I would like to see them working together again in drama or movies.

Romantic love story between ML a Korean man who is an idol in a group & FL a Japanese woman who is ML fans but ill & treated in hospital.

A romantic love story between 2 ML a Korean man look aloke & FL a Japanese woman. They met in the ryokan/inn where she works from generation to generation.

A romantic love story between FL Japanese woman & ML Korean man. Hwang Chan Sung is adorable in this drama. His previous Japanese drama Kaito Royale also good to watch

Fantasy love story between FL Japanese woman & ML Korean man. This is the remake of 90s Demi Moore Ghost movie.
Korean potter Jun Ho meets successful young entrepreneur Nanami in Tokyo. The couple falls in love and soon marry. A year after their marriage, tragedy strikes when Nanami is killed on her way home. Nanami, not ready to leave this world, remains in this world in spirit form. During this time she learns that her death wasn't an accident and her husband Jun Ho is in imminent danger. Unable to contact any humans except a psychic named Unten, can Nanami warn Jun Ho before harm comes his way?

Sad romance love story between ML a Korean man an exchange student & FL a Japanese woman a local student in the university where she meet ML but tragic accident make them apart forever. Based on a true story in Japan.