Recommendations

In both dramas :
- Dissociative Identity Disorder
- Double Identity
- Psychological Romance
are common

Though the main genre is quite different both kdramas have romance
> FL is abused by her husband and wants to get divorce but the husband is unwilling
> ML loves FL a lot and tries his best to protect her.
> There is a 2nd FL who is in love with ML

Though the genres are quite different there are some similarities.
> Both feature Park HyungSik
> ML falls in love first
> Both FLs are strong ( in SWDBS she is extraordinarily strong)
> While SWDBS is RomCom, happiness only has slight romance but both leads have amazing chemistry.
> Both ML and FL protect each other. (In SWDBS, she is actually his bodyguard)

1- both ML have been well trained agents
2-it starts the same ( drama started with how they got into fighting the bad
3-both ML have slightly romance with FL
4-in both dramas are ML working with other leads like a squad

- both played by yeo jin goo
- both involve ordinary police rather than detectives
- townspeople are equally suspicious and could be added to the suspect list
- both lost their younger sister when they were young

Though story is quite different it gives similar vibe.
Strong FL against a rich and powerful opponent.
Both the Fls loved the kids dearly and wanted to protect them.

Similar back story
Both involve boss falling in love with a person in lower rank
swoon worthy
Lot's of awkward moments before they find themselves

- Hate to Love
- Initially ML bullies FL

- Office Romance
- FL is a regular employee and ML is the boss
- ML lost his parents in an accident
- ML falls in love first
- Amazing chemistry between leads
- Good 2nd leads stories

- Her private life is also a ROMCOM with office romance.
- The leads have fantastic chemistry
- FL works under ML

If you like ROMCOMs and love Business Proposal, you will likely like touch your heart too.
- Both are office romances
- In both of them the leads don't have a great start
- FL works for ML
Both of the dramas are very cute.

Both have jingoo and both have a bit of connection with memory and feelings sharing. Circle was scifi but link is maybe a magic?

If the love alarm app was a human it'd be Eun Gye Hoon xD there's a bit of "connection" and empathy but in a magical way

Both are focused on food and both have a murder mystery thrown in the romcom vibe
Might also share the style of friendship and slice of lifeness

-both rich ML.
-both poorer FL who is on scholarship.
-both ML bullies FL but they fall in love, (F4 has more severe bullying and more social media being used.)
-both ML fails at asking on the first date smoothly.
They are both very similar but F4 is Thai and D.D.Y.D is Chinese.
I loved them both, striking similarities.
Greatly recommend you watch it.