Torn (2020)

Pretty much similar as both are love stories between a comic character and a real one. Comic characters pop out from the comic book in both.
W is a love story but with much Action, Thrill and Suspense.

Same concept of a character popping out into the real world, female leads having to help them out and make sure they're not making a mess or being revealed due to their lack of identification.

Both MLs are comic book character who come to the real world and fall in love with the FL.
...........................

It is similar in the sense that a guy "popped" out of something, in My Romantic Some Recipe, from a stand up poster of an idol...the idol popped out...then on Pop Out Boy, from a comic book...similar because they will both develop some romance later...

In both Pop Out Boy! and My Dear Warrior, a fictional guy comes out of a book into real life.
In both dramas the guy falls in love with the girl and the two main characters have to cohabit in the same home.

Both Pop Up Boy and Lost Romance deal with falling in or out of a fantasy world.
In the case of Pop Out Boy, the ML is thrown into the real world. He used to be the MC of a comic book.
In Lost Romance, the FL is thrown into a novel.
In both of these, one character loves the other and is constantly rejected. However, they eventually melt the hearts of their partners. Both of these dramas also use the plot of "running out of time" in their new world. They also use plenty of comedy which is always fun to watch!

Male Lead Pops out From a Comic Book.
Similar Female Leads and a lot of fun
Male Lead rejected by female lead

Both of these dramas feature a character getting stuck in a fantasy world or a fantasy character getting stuck in the real world.
But have romance, both have cute side characters, and both have open endings.
Pop Out Boy is a light, cute, webdrama while Memories of the Alhambra is a bit sadder and was aired on TV.

Both are mini dramas in which the MLs are from a comic book and the FLs are from the real world, and the two meet when one crosses over to the other's world.

Both are short length dramas where the main couple are a person from the real world and a manga character.

Both are funny short length dramas in which the ML is a self-aware manga character. The ML of POB is corny whereas the ML of ZBNNSVZBLNNO is constantly trying to get out of corny tropes.

Both dramas have MLs that come out of stories to the real world and continue to have an overly romantic and idealized personality and behavior due to the way they were written.

Both are mini dramas in which the lead(s) is/are self aware manga characters. Both play with common tropes/dialogue.

Both are short length dramas in which the ML is a sweet but corny manga hero protagonist who comes to the real world and begins living with the human FL. Both dramas have a very similar quirky and funny feel.

Programmer Liu Qian Qian is tasked with designing the male hero Nan Gong for a new romance computer game for women called “Perfect Boyfriend”. But Nan Gong unexpectedly breaks through the dimensions and appears.