The Beauty Inside (2018)

The plot isn't similar, BUT they share a same vibe.
- Fake dating turned real.
- The ml have similar characteristics and looks.
- Co worker/business partner turned romance

The male leads of both dramas suffer from Prosopagnosia, a face blindness condition. They try all ways to recognize people in their own ways, but they get help from their secretaries. The stories are totally different but they are both enjoyable, full of humour and great romance.

Both shows have Lee Min KI in it.
Both have similar tone: Rom-Com with a lot of heart.
Both have a contract relationship.
Both Female leads have amazing friends that support her no matter what.

MLs are CEOs of the company. Both have fun and interesting love stories with two couples in each drama. The Beauty Inside is melo, while A Business Proposal is romcom.

Well the similarities between the two dramas can be summed up as :
- Very similar characters setting
- Quite Similar plot
- You might like it.

Both dramas has the same kind of concept/plot which involve the body swapping part. The story is not focused on people's appearance but their inside.

both have the "cold rich male lead with a traumatic past", and they both have a mature/grownup ish romance.. with a strong female lead...
also, the parents in both dramas are more supportive than the usual romcom parent ;p

- both shows have chilling, heartwarming romance
- both FL are actress
- both shows have main roles with special condition, that lead them to attract and complete each other

FL is aso celebrity
Chemistry between the leads is just amazing
Cold man /warm women
Both have a slice of family involvement

Han Se Gye is a top actress, also known as a troublemaker, with many rumors around her. To others, her life appears as a mystery, when in fact she is faced with a strange occurrence where she must change into a different body and new identity for one week a month. She encounters Seo Do Jae, a brilliant man who is an executive at an airline company. He seems to have it all: a perfect appearance, knowledge, and a good job; but he has a secret too. He suffers from Prosopagnosia, the inability to recognize faces. However, he manages to hide this from the world, every day he makes an effort to remember people by their personalities.
Seo Do Jae's life begins to change when he meets Han Se Gye. She is the only person whose face he can recognize. But with Han Se Gye's constant disappearance and change, how long can she keep her secret?

I absolutely loved both dramas, for thier light sprinkle of basically unexplained magic.

ML in both is a CEO with a hidden problem.

Strong FL in both I love a women I can really root for.

Similar slick look and feel.

Han Se Gye is a top actress, also known as a troublemaker, with many rumors around her. To others, her life appears as a mystery, when in fact she is faced with a strange occurrence where she must change into a different body and new identity for one week a month. She encounters Seo Do Jae, a brilliant man who is an executive at an airline company. He seems to have it all: a perfect appearance, knowledge, and a good job; but he has a secret too. He suffers from Prosopagnosia, the inability to recognize faces. However, he manages to hide this from the world, every day he makes an effort to remember people by their personalities.
Seo Do Jae's life begins to change when he meets Han Se Gye. She is the only person whose face he can recognize. But with Han Se Gye's constant disappearance and change, how long can she keep her secret?

I recommend this both drama because , Male lead and Female lead
try to solve problem
In one drama explosion and another student murder/suicide

The second couple is exactly like this couple. You will enjoy it. If not for the main couple- who were amazing- then the second couple.

Both the dramas depict FL who are misunderstood celebrities and deal with loneliness and negativity from their fans/haters. Both have cute romance. Apart from that both the dramas have different settings. The ML in The Beauty Inside is a rich chaebol suffering from prosopagnosia while in Fanletter, Please ML is a lawyer who has a sick daughter.