Both have a ML who's liked the other for a longer period of time. Both have that inner dialogue and show scenes of how the other has come to fall for each other. Overall they give off similar vibes.

Similarities:
* Both MLs are "smart" and end up rejecting FLs school paper that prohibits her from graduating.
* I think both MLs end up falling harder in the end
* No ugly or messy love triangles.

Differences:
* In "Fall in Love With a Scientist" the ML has had a crush on the FL for a long time, so he falls first and takes the initiative in the relationship. In "Perfect and Casual" the FL falls first and later the ML realizes he likes her.
* Perfect and Casual has a contract relationship, and they live together. FILWAS does not have that trope.

Wellll how do I put this.. If you like the red flag in a ML then watch this one..
Both have a red flag ML who uses the other. In BGMB, he hurts him on purpose due to "jealousy" I guess... we don't know a whole lot about him yet (this is ongoing as I'm writing this..) and in "My Stand In" the ML uses him to satisfy his own needs.

Either way.. if you like that red flag romance where your heart hurts for the other, and later get to watch them make up for their mistakes..... I'd recommend watching the other.

Guys... trust me. It gives the same vibes... Same vibes all around.
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Both have MLs who have known and liked the other for a long time. If you watch one, you'll be like.. "Wow." I'm getting similar vibes...

Similarities:Both FLs are teachers for younger kids. Both MLs are well known/popular and fall first.
Differences: 1% is Korean and Omukae is Japanese. The MLs are kind of polar opposites in personality, one is cold/introverted, a little odd, and the other is outgoing, loud, rude, etc.

Similarities:
- Both have similar vibes, with a "bad guy" character. In unforgotten night it's the mafia, and in love in the air, it's a player biker and another "bad boy" mechanic.
- Both "bad guy" MLs are protective of their significant other and even rescues them when they're in danger.
- Both have steamy scenes,

Differences:
- Love in the Air is more on the youth side. (takes place during college) and has 2 love stories
- Love in the Air, I feel like is more on the romantic and "cute" side of BL. While, Unforgotten Night is a romance, don't expect any "awww" scenes. Ya know?
- Unforgotten Night, compared to Love in the Air, is darker. Expect more plot twists, drama, etc...

Similarities:
* Both have idol MLs
* Both have singing FLs
* Plot is about chasing your dreams
* Love triangle

Differences:
Liar and his Lover: FL falls first, high school student FL
Secret playlist: ML falls first, college student FL

Both dramas are centered around youth, music, and romance.

* Both have idol ML that fall for the "regular" girl
* In both, the ML falls first
* Both are web series, totally bingeable

There are for sure differences here and there, but both of these dramas give off the youth vibe, and is similar in content.

* Both are centered around the music world.
* Both MLs are idols
* Both have a love triangle that's not too severe

Both dramas give off the same vibes. If you're looking for a youth drama with idol MLs that's centered around the music industry and their romance, this could be one that you enjoy.

These two dramas have the same vibes. It's centered around youth and music, and how they make those dreams become a reality.
-Both have a singing FL
- Both have a love triangle

How do I put this... these dramas give of similar vibes. When you're watching one you think, "This seems like the other.."

- Both have a popular/famous ML who falls for their assistant. In Moonlight it's his editor, and in Assistant of Superstar it's his assistant/tutor.
- Both MLs fall for the FL quite quickly, which causes many jealousy scenes to occur.
- The similarity between the ML's in these shows is uncanny. They are so cute and childish once they fall for the FL.
- Both the ML's save the FL from distress
- In both, the leads end up living with the MLs and they don't want them to leave. (super cute)

The vibes between these shows are so alike. If you like one, you might like the other as well, definitely recommend.