Recommendations

These two sounds so similar in terms of plot settings except for the line of work both deal with smart male leads who want to fight against workplace corruption and a whole lot of related consequences

Both the shows have following
Smart male lead
Insider investigation
Corruption
Politics
Wanting justice

Both shows are based on ghost seeing leads and exorcism although the character may differ but the foundation of premise looks pretty similar

ML is older than FL.
Romance is believable and chemistry is amazing in both.
Both dramas are top tier romance dramas that are produced and executed really well.
Both are based off novels.
Feel of the dramas is similar.

In both dramas, the FL has a crush on the ML since she was a student
The ML doesn't reciprocate her feelings at first, yet he slowly falls in love
both are romantic and very cute mixed with some dramas

Both dramas are about young love
One of the leads in each drama has an unrequited love for the other lead, which is not reciprocated at first

Both dramas are warm and lovely with beautiful romantic scenes

Both dramas show young love, where one of the leads has an unrequited love for the other since they were students

Their love is not mutual at first, however, as the story goes, they open up and start loving each other

both show school days and dramas too

Both are about young love
one of the leads has had an unrequited love for the other since childhood but it's not reciprocated at first
Both are very warm and fluffy with a little bit of drama involved.

Both dramas show young love and school scenarios
The FL in both has an unrequited love for the ML which is not reciprocated at first but soon the MLs fall in love with the FLs
Both are very fluffy and warm dramas that melt your hearts

Although the plot is different both Dramas are very cute.
Both stories started off as a crush and developed further. So if you enjoyed Hidden Love (which i'm sure you did) you may enjoy Crush as well.

Solomon's Perjury is a good mysterious school death story. The two parts together also amount to a similar length to the mini drama - longer than a typical movie but quicker than a full length drama.

If you likes one you'll definitely enjoy the other both revolve around a trio of two guys and a girl and how their relationship goes through a change over time for better or for worst

Both start out in high school and have an age gap between the leads with the younger one chasing the older.

Both dramas have
-Strong, smart female leads
-Strong male leads
- Have immortal sects, Deity elements
- Both drama is Romance and fantasy dramas.
- Have gorgeous costumes and strong cgi

Both are absurdist comedies in historical settings. Both are not very serious, and both have modern humour and are based on Manhwas\ Animes.