Recommendations

Well, actually the Male leader character is totally different from GO Into Your Heart and Your Highness, The Class Monitor. In Your Highness, The Class Monitor, the male lead is played by Niu Jun Feng but the character is totally an extrovert whereas in GO Into Your Heart the ML is introvert. But I guess, you will enjoy exploring two different characters played by the same person and that is why I really recommend this show to you…!
The plot of Your Highness, The Class Monitor is also really very good…from enemies to lovers forever…
Hope you will like that show…!

A girl is just 14 years old, but she endures a difficult life. Her parents abuse her at home and she is bullied by students at her school. She doesn't have a place where she can feel comfortable. One day, the girl is kidnapped by a man wearing a mask. The kidnapper names the girl Sachi, while wishing her to be happy. For the first time, Sachi can feel happiness.
(Source: MyDramaList)

Although different in genres and setting (Blue Birthday is a high school based romance, 365 is more pure thriller), they both have a similar premise of going back in time to save a loved one. They also have some similar twists (although I wont say more so as not to spoil). Blue Birthday is more light-hearted while 365 is more dark and suspenseful, but if you're looking for a similar set-up and don't mind the tone changes, give it a go!

I'll edit/update this once I finish Cute Programmer, but so far, here are some similarities:
- ML attracted to FL at first sight
- ML is great in his field and is actually a kind person
- FL is very capable at her job but is also very craing (and while she likes ML a lot, she is still independent)
- There is a sibling-bestfriend Second CP
- Takes a while for main CP to admit that they like each other
- Also at the end of each/most episode, they little monologues (so its has a dash of that nostalgic/learn-from-life vibe)

Seunggi character really similar in this drama, at first he look nice, then u know he's.....

try watching it first, u may understand what I mean.

In both movies, there's a psychopath hiding a victim, while someone is after him.
I both movies the event takes place in just one day.
The psychopath can easily fool people making them thing he's a nice guy, what makes others dirty.

Both have the same heartbreaking stories, and depicts the job as a host/stand-in service! Both FLs are experiencing marriage + identity problems. Both are depressing in their own ways.

Both are:
People copying with the loss of someone special for them,
Have situations regarding marriage and infidelity.
Depression.
Money and Job issues.

Both interesting, thought-provoking films about World War II. No Regrets for Our Youth focuses more on the pre-war period, while Children of Hiroshima focuses on aftermath.

These two movies are nothing but similar. But if you are looking for some eternal love with survival story and an unique plot line, you may try watching 'The Jade Pendant'. Though it might be underrated but it is actually a rare gem.
Hope you like it!

Both dramas are similar in most aspects. One of the main differences is that there is no divorced couple in Smile you. Watching OA gave me a similar feeling to SY. So if you liked OA, you will certainly like Smile You.

Both shows involve the leads struggling with trauma from their childhood. Eventually, they realize that they can begin the process of healing together. Heartwarming romance without second leads interfering with the relationship of the main OTP. The friends/side characters are also interesting.

Both films are directed by the same person - Li Xiao Feng, and are similarly pessimistic , with plot following a similar path

The main lead in WIL and Doctor Ian Chase from YAMS have some similarity in behaving like sociopaths but in Well Intended Love it is shown as romantic guy and in YMS as dangerous and prone to the worst. I think both of them are sociopaths and I strongly recommend to see and compare it ;).

Similar family story but Dear parents is lighter and funnier and has hope and happiness sometimes unlike The bond that combined the most Misérables family reality in a drama