Recommendations

Shimura Teppei (Fujigaya Taisuke) grew up watching his policeman father who would ride side-by-side in marathons because he was a motorcycle cop, and dreamt of being a marathon runner as a child. But Teppei’s father lost his job and disappeared. Teppei ruined himself by becoming a well-known delinquent in the area. Under the influence of his childhood friend, Yuichi, Teppei chose to become a policeman after graduating from high school. He miraculouslypassed the recruitment exam and entered the police academy. However, he has been assigned to a “class of reserves” (Goriki Ayame, Koyanagi Yu, Okamoto Azusa, Mizusawa Erina, Ishii Tomoya, Mori Ren) which is a gathering of odds and ends. There are eight of them and each day they are only instructed by the assistant teacher, Ryuzaki Misaki, to sweep the academy grounds.

-rich guy/ poor girl
-enemies to lovers
-guy is a total spoiled jerk- girl is nice but tough and doesn't take his crap
-slow burn romance/angst
-they both have their own sad backstory
-the guy changes and become a better person because of the girl/through love

it has the enemies to lover trope like meteor garden where the girl is poor but tough and the guy is a rich spoiled brat with issues of his own who is mean to the her but he eventually changes to become a better person thanks to her and both fall in love with one another and face obstacles to be together. its a slow burn and bickering between the two.

They both start with two lonely people who enter contract marriages for financial reasons and find out a lot about themselves and each other while falling in love.

Male protagonist both lost someone close to them... later in the future, they meet someone who look identical to the person they lost. Both crime/detective dramas. Both female protagonists are followed by people who are after their life because of the main male protagonist

Pretty similar office rom-com dramas. They have the overlapping "mean boss" and the awkward but lovable main female lead. Both very enjoyable!

Although I haven't seen this drama, it sounds similar to a Chinese drama called Dear Prince, which I've seen. Dear Prince and Paragit Likhit Huajai both have main characters that can see the spirit of a superstar that was in some sort of accident. So the plot is very similar.

Similar vibe. Lead has special ability that helps with solving crimes. Watching While You Were Sleeping reminded me of The Girl Who Sees Scents

girl falls first.. clumsy,childish ,baka shoujo type XD
boy totally utterly n cold heartedly rejects :v
then starts to notice..gradually falls..
:'( strong second lead syndrome..
1st lead childish jealousy..
and they live happily ever after..

Exact same plot line, only GBC is centred around both leads and this is about the female lead. Second chances are everything! GBC is the superior drama though.

Both shows are written by the same people and have a very similar feeling. They seem cute, innocent and lighthearted on the surface but address problems in society at the same time, especially concerning women’s rights. There are very progressive themes in both shows that you don’t find in most dramas. I highly recommend them both! I promise you won’t regret it :))

For those that can not get enough Contract Romance.
In both dramas the couples end up living together due to circumstances. In both dramas, the couples sign a contract and enter into a fake relationship. Both dramas are done well and are in my top 20 all time favorites.
The personalities of the characters is different
Because this is my first life is a little more slow paced and thoughtful. Full House has more comedy. This Thai remake of the original Korean drama Full House is 10yrs. newer and has great Chemistry between the leads! Very worth the watch, even if you do not usually watch Thai dramas.

I'm actually surprised that no one recommended this yet. It's similar because the female leads are the same actress from My Little Princess and this time, instead of a female with princess syndrome, there's a male with prince syndrome. The cast is also the same. :)

Same storyline, about relationship and friendship between a horse and jokey. Same actors and stories that make u think if this movie is sequel for Champ.

This is the original source material, for "Because this is my first life" . And one of the most acclaimed Japanese dramas ever, so you can't go wrong.