both are done by the same screenwriter, and both are scifi fantasies. one is about time traveling and the other is about dual universes ;D

if anyone wants to see Seo Ye Ji in a more "normal" yet still strong, independent and fashionable role after It's Okay to Not Be Okay then they should try Quantum Physics

both Birthcare Centre and Avengers Social Club are female centered and "black" comedies, ie my type of story

Both are office dramas about bad bosses and hard working environments. While Feel Good To Die is a fantasy genre both are comedies

both Kkondae Intern and Search: WWW are office dramas and both main leads work for the rivaling company of their former work place

the 1st ep of Kkondae Intern had the same mistreatment/bullying by the senior in the workplace as To Each His Own

both are about characters running for congress and both are kinda big fat liars that end up being supported becasue of their brutal honesty xD also both are comedies though An Honest Candidate is more of a "fantasy"

both Pop Out Boy! and W have comic characters that come out of the comic and the love story between a real person and a comic character

Pop Out Boy! and Extraordinary You involve comic characters and the "magical" way they become "real"

both had the "4-against-1 romance" while Was It Love is 4 guys 1 girl and Ex-Girlfri1end Club was 4 girls and 1 guy. plus both have Song Ji Hyo

both female leads are "uncaring" of the social norms and they say and do things that seem "weird" to other people.

both female characters are strong, independent and fashionable, and both male leads are the sweet not jerk kind
plus the directing and the vibes of the dramas feel similar and aesthetic~