Recommendations

-Time travel to save the one you love
-Both of them are really good.

Just watch it and you will see the similarity.

In each drama, their is a girl with very good qualifications who ends up moving in a socially awakward -yet accomplished- man.
This living arrangement will lead to a marriage of convenience.

Set in the same time period, both dramas follows young individuals, their infatuations, love, deceptions and growing up.

While the storyline is different, the dramas give off the same vibes.

Both feature foresight/changing reality
Both have a touch of mystery, action and romance
Both have Lee Jong Suk starring as the male lead

It's set in the making drama production world this time focusing on directors and some writers. It's interesting to take a peek of how the lives of people who write and direct what we watch probably unfold and it's very well written too.

They're both about marriage, time travel and regretting your past, when I started watching "Go Back Couple" I immediately thought about "Operation Proposal" :)

Both are relatively light-hearted dramas featuring ghosts which eventually become friends with the protagonists. IASILY has a male ghost, N has a female ghost. Both dramas have a great balance of comedy, romance and melodrama.

Both the histories are about female prosecutor and their daily, but the histories are interest with unsual events.

One of the main characters has a girlfriend and will develop feelings towards a guy. Other stories, BL or not will also be told throughout the series.

Aim who played Plern Pleng, Knock's girlfriend... now ex will be part of What the duck. She is also the girlfriend of one of the guys but different from TWM's Plern Pleng, she has a story to follow. Not someone who plays the villain between two guys.

Both has the same format of having several stories on one series. The core story following two guys developing feelings toward each other. With other stories connected to the main characters.

Both dramas released almost at the same time, involving romance, politics, war, historical, action ...etc, but this General And I is 100x times better story line than Song Of Phoenix.

It's similar in that two youngsters fell in love while they were on a vacation. It featured innocent first loves and love lost. However, Unforgettable is insincere. It was created to manipulate tears out of gullible viewers, who probably came out to watch this movie due to the popular main cast. Classic wasn't perfect, but the story, at least the one set in the past, is more believable with more tangible sensitivity. If you want to reminisce on bittersweet first love, don't waste your time on Unforgettable and watch Classic instead.

In both, the male lead is a high society person who ends up working under poor conditions/low class, where he falls in love with the female lead.

Chaloey Sak is darker in tone/more melodrama like.

Both have the handomest of male leads of thai lakorns!

Revenge stories that leads to love, one of the leads hates the other and tries to avenge them but ends of falling for them.