Recommendations

Both are recommend for fluffy romance lover.Fact is in both dramas male lead has a psychological problems.But the male lead personalities are different in these dramas.If you want a stress free, relaxing and healing warm rom com then watch Since I met you.
But if you want a push and pull romance type dramas with interesting plot then watch my girlfriend is an alien.Both dramas are very much good rom com.

The plot of "Since I met you " is much simple and real life based story.Almost no toxic character .Meanwhile "My girlfriend is an alien " is a fantasy rom com ,toxic characters is available here.Morever the plot of my girlfriend is an alien is deeper than Since I met you .

Pardon my grammertical mistakes.

Plot of these 2 series are not similar.But the growth of the relationship between the leads are almost similar in these 2 dramas.Both dramas are sweet and fluffy.

The plot of "Since I met you " is much simple and real life based story.Meanwhile "Fall in love with him " is a fantasy rom com.

both have:
- fast paced romance
- includes a rich male lead

I feel like pure romance lovers will love this drama too

It's literally its predecessor series so why tf not? Because.......erm............it's still Love in The Sir mwehehehehehehehe idk what to write fr

=> We see in Scholar Walks at Night episode 17 that Lee Joon Gi acts as 3 characters meeting. In Arthdal, fans are waiting for Eunseom Saya meeting. You can use LJG Scholar Walks at Night scene to see how he will act the meeting scene of Eunseom and Saya in Arthdal.

The red string fate... Always been a huge fan of this concept... Though both the dramas depict it in a different way... But who wouldn't love the coincidences of fate...

Both are historically set mini dramas with the same cast and a very similar feel/plot
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Both are historically set mini dramas with a doctor ML and a similar feel/tone.
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It continues the drama.
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Both have "reverse harem" genre with handsome male leads ................................................................................................................................................................

Both have "reverse harem" genre with handsome male leads ................................................................................................................................................................

Both have "reverse harem" genre with handsome male leads ................................................................................................................................................................

Both have "reverse harem" genre with handsome male leads ................................................................................................................................................................

Both have "reverse harem" genre with handsome male leads ................................................................................................................................................................

It was a bit entertaining and short. Although the comedy is overused and silly but it did gave me a good laughs ….
The drama was too animated for my taste. But the plot is interesting but not original . I was hoping for it to get better with less humor and more. But it was not that bad, maybe the 2nd season will be different .

The characters feelings were potrayed well but they were acting like teenagers not as adults in college it’s little annoying me . The whole drama was comedy maybe thats why they made the characters in this way .
This the type of show that I'll watch for time pass. But it is not the kind that I'll rewatch it again .
Both series involved soul swapping with female which leads to chaos.