Recommendations

They both start off similarly. the secondary couple is similar to LCDF. both MLs are nerds and plans to abroad for studies. both main couples are each others crushes for quite a while. the first half of the plot is similar.
the difference is that in LCDF the story revolves around their adulthood while in AIWFLIY the story continues to their collage. though collage life is shown in LCDF its vague.
i overall got similar vibe from both dramas.
I highly recommend to watch LCDF if you liked AIWFLIY. i personally liked Le Coup De Foudre more than All I Want For Love Is You.

Jae Chan in this drama certainly reminds me of Nam Sin III in Are You Human Too? I find both male lead characters incredibly charming in the way they relentlessly protect the female leads. Both dramas also have incredible screenwriting so I'm sure you'll enjoy AYHT as much as you enjoy WYWS.

Female lead’s luck is very bad while the male lead’s is good. They bumped into each other one day and their luck exchanged.

60% similar plot, same era, and costumes.
While 'Blossom in Heart' main business is cosmetics, it is perfume in 'Legend of Fragrance' so even the settings with flowers, etc. is almost identical. The old family secret, lost love, revenge, and missing FL father is the same ( even the actor is the same LOL).

They both involve a group of 30something trying to succed in life (careerwise and relationshipswise) and the different obstacles they must face in order to get where they want to be. Also they both try to destroy the mindset of "when you reach 30 you're too old to do anything new". They're both about friendship and personal growth

There was nothing about fantasy in INR3 but those two, somehow, gave me the same feeling !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

So, I recommend Shin Don only because it has common historic characters with Faith. You'd watch it if you have educational purposes (want to learn more about the period).

Although the plot is totally different..but in both the stories romance between the main leads start with the need of being with each other rather than love. And also, the FL has a crush on the SML at the beginning..;p

Container is a really simple and dark short film with a mini twist. It feels like it could fit right in with one of the Horror Story movies.

This has similarity because of the everlasting love. ^_^ the girl was cute and the male lead was handsome. The story was fluffly, light, not so many angst, it's so enjoyable for watching on a rainy days, binge-watch, curled at comfy sofa and eating your caramel popcorn.

If you'd like another slow-paced, sincere and kinda long but SO worth it drama with family value, then My Golden Life or My Father is Strange is one filled with that .
The stories are different but they both make you think of your family and close friends. And you grow close to all characters in the stories.
Both stores include a fake sibling phase too.

Nothing is much similar to it. Just want to recommend another good web drama that everyone need to watch
Both dramas are kinda refreshing and for youths. It's the drama that can't dissapoint anyone

These are definitely emotional and beautiful stories! Must watches! I will be rewatching them in the years to come. Beautiful love connections within the actors so definitely looking forward to further projects of theirs

Both drama and film focuses on the spirits of the dead who stay within a magical place, waiting for their chance to go to heaven whenever they consider themselves ready. As they await for their turn to go to the afterlife, the beautifully flawed spirits settle their conflicts and differences, healing all while learning how to let go of the life they left behind.

Both magical girl genre, Akko’s Secret is based on old anime Kiki’s delivery service is based on old magical girl movie
I think you may like this one based on that.