Recommendations

W and Nine are written by the same writer, Song Jae-jung, in which she managed to establish unique concepts in creating the world of both dramas. Even though W has only aired two episodes, it delivered a very intriguing and interesting story just like Nine. The two dramas have different plot (Nine is a time travel themed while W revolves in the fictional world of a comic character) but I must say, they actually resembles each other in the way that suspense, humor, and romance has a nice balance on the way the writer tells the story while still focusing on the fantasy element of the drama.

Both are body swap dramas with different settings and their issues along with standard parent child bonding

They are both about women who fall in love with a comic book character that is able to come to life.

In Dramaworld, a woman ends up in the parallel world of dramas, influencing their course.
In W - Two Worlds, it happens in a specific manwha.

- A girl who has to live with 4 very handsome flower boys in a mansion .
- various conditions are involved
- romance
-reverse harem

It's a plot that revolves around friends, plot is different however a few similarities to know that they both kind of clash. If you think watching Unforgettable was a waterfall mayhem, ONe Way Trip won't disappoint.

About a girl who lives with a guy/guys, and ends up finding love. Both are Japanese dramas with light, fluffy, comedic and heartwarming moments.

The plot for both dramas are similar, about a couple who loses one another and in the end grow to love one another again. It's a drama worth watching, lot's of laughs and tears. And to top it off, a lot of idol actors too. Come on! Who would turn down Winner's Kang Seung Yoon?You'd be crazy if you did.

Takes place in Joseon and shows non-expected viewpoints, one of a prison warden, the other of a long lost Princess. Both engage in a series of event that try to over turn the political corruption and help the people of Joseon.

Twisted psychological warfare is involved in both as the main characters face a series of events presented to them through the filming of a reality/game show. They're both given tasks to complete or otherwise face great danger.
Wanted is about a mom trying to save her son from a kidnapper who requests her to make a show and complete the missions he gives her everyday, for 10 days.
Liar Game is about a naive and innocent girl who gets thrown into the world of trickery and greed by participating in the Liar Games which will require her to play games to either win lots of money or fall into a grave debt.

Written by the same author with very similar story about one of the leads losing their ability to hear at a certain age deal with life, romance, etc

Both have people who can see and talk to the dead, multiple cases along with a long running story

Same writer, same elements. I'd definitely recommend Sorry, I love you to anyone who enjoys Uncontrollably Fond.

Other than both starting with the letter O, both dramas deal with the dead, whether or not it is trying to fulfill last wishes or solving murders. In relation to the characters, both have headstrong protagonist female leads also stringing the male protagonists (with vastly different personalities) along.

Make Me Shudder 3 and Dangerous Boys both are based around the lives of idiotic students, and they both have aspects of adventure and excitement.