Recommendations

Both are about the relationship between the mermaid FL and the rich human ML.
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Both MLs are saved by a mermaid and a treasured jewel is stored inside their bodies that the mermaids want back.

Both are similar in the sense that the woman has a superpower but it does not work around the ML. Which is what starts the romantic interest for her in him, as she thinks he is special.

This drama even features in My Lovely Liar

Same leads. Ancient setting. Good chemistry. Even better kisses. Intriguing story development; never gets brought to resolution however. It’s as if there was originally intended to be a sequel, but the team just abandoned the project. There definitely needs to be a Season 2 because the last episode had a huge cliffhanger.

both are supernatural-themed, snappy, fast-paced and have similar styles of dead-pan humour.

both have leads who can communicate with the dead to resolve their last wishes and find out the backstory of their death (in the movie, its only 1 ghost whereas the show has many).

they both begin as comedies that progress wonderfully into sentimental stories that hit you hard (u may cry lmao)

both are bromance-heavy Taiwanese productions and if you like one, you'll defs like the other.

Finest work by same ML.

This show has the same format in that the contestants are taken to an island to get to know each other. It also has a few main hosts that react and Cho Kyu Hyun is a main host as well. If you liked 19 to 20 I highly recommend this show. It has two seasons but I personally like the second one more than the first one and you can watch them in any order you want.

I'm actually upset that no one has recommended this yet. Some major points of similarity as both have:
- non-blood-related siblings/???? (childhood sweethearts) turned lovers trope
- banter (except I think Sweet First Love's is a lot better) between the leads
- a lot of romance which makes it perfect for mindless binging (more so in Exclusive Fairytale in my opinion)
- school life and uni life (although there's more school life in Sweet First Love)

However, if you haven't watched both and want to know which one's more suited for you, Exclusive Fairytale is 1000% romance-centered but has none of the stereotypical misunderstandings or jealousy. Whereas, Sweet First Love has sparks flying everywhere that is on an incomparable level for me, and it contains quite a bit of jealousy from the male lead, but is so cutely executed. It does also have a little bit more plot development than Exclusive Fairytale.

Male Lead in both dramas see and interact with a supernatural being who other humans can't see/interact with.

Male Lead in both dramas see and interact with a supernatural being who no one else can see/interact with and eventually fall in love.

Female lead writers a novel and her lead guy character came alive in her world in Mr.Bad while in WW female lead used to draw. Her father made a manhwa from her character, She ended up going into lead guy's world. Later on he also came to her real world just like in Mr.Bad.
In both dramas Later as story progress both lead males learn they were imagination of lead girls, had hard time accepting being a fictional character...
While they were in loss both couple's relat?onsh?p progress and have romantic stuff progress too.

- The plot is similar it gives the same vibes
- But in Somehow 18 its ML who goes back in time
- FL dies mysteriously everyone says he committed suicide due to ML didn't move on from that trauma even after 10 years
- ML gets a chance to travel in time back to school and save the FL