Recommendations

Something in the Rain is quite similar to Our Beloved Summer in terms of the overflowing chemistry between the leads and the overall realistic feel and portrayal of a relationship.

In both dramas, the protagonists begin their relationship as sex friends. In Rinko-sa wa shite mitai, the female protagonist proposes a pact to the male protagonist so that he can forget his first love.
Also in Dramatic Night there is a pact between the protagonists: they will meet 10 times to forget their respective exes.

They are two really different dramas, but I also agree that they have things in common.
In Cherry Magic the protagonist is still a virgin at 30.
In Rinko-san wa shite mitai the protagonist is still a virgin at 27.
They both have no experience in love and both, after some doubts, fall in love with their colleagues.

similarities:
-older woman/younger man
-cutie ml
-fl doesn't like office romance
-office romance
-eye candy leads

Supernatural drama
Mystery in the story
Secret relationship
Similar story setup.....
Nice male lead......

Both are super funny, and are set in police environments.
Both about a pair with a cute/funny dynamic.

Both about two pairs of women working in life-related jobs (police/nurse).
Both really motivating, funny and cute!

The two movies tell the stories of ill-fated people coming together with many conflicting emotions of hate, pity, and guilt portrayed in a slow burn yet very engaging manner.

in both dramas the female protagonists are virgins, with no sentimental experience. And in both dramas the protagonists are colleagues.

MLs are CEOs of the company. Both have fun and interesting love stories with two couples in each drama. The Beauty Inside is melo, while A Business Proposal is romcom.

The film will continue the story from the drama of the same name.

Wang Shuang's character gives a vibe to her past series of Well Intended Love 2 where she was both an actress.

-The FLs are both strong, quirky, and independent with great personalities
-They both have a story around the FL's dreams in sports (fencing/weightlifting)
-The ML in both is NJH.

So much went on in both series, all the side characters and how it went so well with the storyline remind me so much of how similar this series is. Although if you're looking for a bit more of a romance, I think LST has it. SSS is about the ML

The first thing that came to mind was Chinese Paladin as I was watching Sword Snow Stride. These were the closest similarities I can find:

Lots of traveling
A bit of a love line going on
Wuxia