Extraordinary You

Memories of the Alhambra is about a VR game turning into real life.
Meanwhile, Extraordinary You is about the characters of a comic book becoming self aware and trying to change their fates.
At first, these may not sound similar, but if you look harder you'll find many similarities.
Ignoring the fact that the relationship in Memories of the Alhambra is hate-to-love while Extraordinary You is more of a soul-mates relationship; the way that the main couple interact and try to change the foreseeable future is very similar. And the premise of both are being stuck in a fantastical world.

if you like Extraordinary You, you might like Miss Ye in wonderland ;)

Although these dramas do not have similar premises, they do have one similar plot device. Both of the couples in these dramas knew each other in their past lives, and the FL's both died because of the ML's.

every time I try to describe Haru, I keep going back to this point. Haru was really similar to Nam Sin 3. in some ways both were like new born babies? both had no real past, and in some ways that led to them being "characterless" in a way that everything felt new and weird to them.

In both, the ML is a manga character. In EY, the story takes place within the manga, in MPBGMPB, the ML comes to the real world.

I am sure that if you liked While you were sleeping you will love Extraordinary you.
Both have a love triangle in which the woman discovers first somthing fantastic that later she shares with the men: In While you were sleeping the demale lead can see the future and later the male leads too and in Extraordinary you the female discovers that she is a Manga character and later the male lead also thanks to her and also in both dramas the three main characters look for solutions to the problem and try tu change their fate.

I'am not good at explaining myself but I swear that you will not regret watching the drama.

The two are high school romance dramas with love triangle and cute female leads ,tall and handsome male leads and pretty love stories .

both have "things not everyone can see" vibe going on, as in the hotel with the ghosts for Hotel Del Luna and the realization of the life outside the comic in Extraordinary You
the link to the past ("past" in EY case being previous story)

and similar ending

They both have high school settings and love triangles. The male leads in both dramas have a simple, child-like, pure adoration for the female lead. However, while Love Alarm has some fantasy elements, Extraordinary You is definitely more fantastical. Extraordinary You is also lighter fare.

Both have super cute big height differences between the main couple. Both couples are students and have a friendship to romance relationship.

The two share the same genres ,while extraordinary you is a fantasy setting ,some scenes give similar vibes and are well developed romantic stories .

Zhang Jing Yi is the FL in both. The chemistry is natural. The relationship had depth. However, BEITD does not have a satisfactory ending.