Recommendations

Both 'YG dramas' so we I had similar 'feelings' watching them.
Both of them have the same lead male.

Romance is important part of plot, but doesn't cover the rest, which is dark, mysterious, more 'for adults' I would say.

Dark dramas for adults.
Crimes.
Mysteries.
'Love me...' focuse on romance also.

Great humor and 'friends-turned-couple' type of dramas :D

The main couple from 'Weightlifting...' play supporting characters in 'Cheese...' and the plots have more differences than similarities, but if you look for college drama, those two are one of the best I've ever seen.

Both historical drama with good blend of lightness and serious/sombre scenes. Has a main girl and many visually pretty/handsome guys. Overall it gives the same vibe but different plot.

These two dramas aren't plot-wise similar at all but the comedy in these dramas is really similar. The overall feel in these two dramas also is really similar. If you liked Entourage I'm sure you'd like The Lover as well. And vice versa.

Both main leads have parted/broken up with each other in the past due to misunderstanding. Now they are going to fall in love once again with the female lead having memory lost and they will try to clear up the misunderstanding. Both have second male lead who likes the female lead and protecting her after being hurt.

Both are about teaching and disciplining students/young men in an academy during the historical period and have romance involved (more bromance in Hwarang).

They both revolve around sports. I also think that, though the dynamic between the leads is different in each drama, the relationships start and grow in a similar way!

both are stories 'down to earth' - I mean, they're showing the reality, the real world and real life, and you still enjoy them!

Both drama, set in historical period, have a beautiful and interesting
plot based on the protagonist's revenge.
The female protagonists are both strong, smart and skillful.
Both drama have a lot of episodes but they are very exiting and never boring.
Princess Wei Young are better in costumes clothing and filming.

both are set in historical period.
both the male main character “Wang So” are cursed princes destined to become king.

both have a female main character who dresses as a man.
both are set in the world of idol music.

Both have an immortal fall in love with a human. There is conflict in knowing that they will never age so this sets the pacing when do come across that one person who intrigues and makes them 'fall' in love. LFATM is a short drama so easy to marathon, the characters are fun and likeable. Immortal leads in both, face inner conflicts in trying to make the right choices about love, and their own personal purpose of the life they live.