Recommendations

Supernatural, spunky female lead (ghost in Arang, mermaid in Legend) with a male lead that starts off indifferent but changes because of the female. Both males have to protect the females throughout the drama. Both males are also looking for their mothers. Both have fantasy, mystery, comedy, drama and romance, and both are based off Korean folktales.

They are both based on true stories with similar people stepping up during WW2 in an attempt to help the Jews.

Both dramas are adorably pure and the leads just steal you heart with with their sincereity and innocence.

Both involve simple predictable plots executed very well.

Both of them just have that stress free, happy happy feel you know?

Both dramas feature childhood frenemies that slowly fall in love.

In addition to the similarity of the male actor, the movie presents the same feeling in his stories

While these dramas have completely unrelated plots, their sense of humor are quite similar. Both are comedies that flourish through their character actors and zany antics in everyday activities. Both have a lack of background music that make the awkwardness and situations all the more hilarious and enjoyable. Fun comedies to relax with!

Both dramas have leads with amazing chemistry between each other, have many cheesy (the good kind) romantic, fluffy moments, and revolve around school life. Sassy Go Go has a darker and more dramatic undertone arguably, but both also focus on mental health, rivalry, heartbreak, and school life. Both are easy and engaging to watch with a perfect balance of number of episodes without getting stretched out. (And also both male leads are just flipping adorable?)

Both shows are fluffy and light with a lot of heart! Watch for the adorable OTP chemistry and coming of age story between the leads. Also, I don't remember ever hating the 2nd leads as the episodes progressed on both shows.

There are both a marriage contract,Also live together..
But a full house comedy more and there is no disease

The same scriptwriter Yang Hee Seung penned both dramas. Both dramas have wholesome memorable characters and comedy within quirky romance. Oh my ghost has extra elements of ghost mystery and thriller while Weightlifting fairy is more lighthearted and slice of life. Both are enjoyable with solid acting from the cast

Both of the series are bl and they both have pretty much the same theme. Two friends that have known each other before, but now they suddenly fall in love(Like Fuse and Tee, it's the same for Phun and Noh). Their outfits are also almost the same hahah>.<
Also, there are some other stuff but i'm scared to post anything that could be a spolier.

The two of them about two lifetimes one in the past and one in the present and they are trying to change the history maybe in a different way but for me i think they are really similar and the both of them are good

This both drama is beautiful and will not make you sick with Romance Comedy :)

Both have mentally strong and smart female leads. I think Princess Wei Young has better chemistry between the two main leads.