Mask

Both are about a poor girl marrying into a rich family and figuring out all of the bad things they've done. Except in mask, the girl deceives the boy, and in the last empress, the boy deceives the girl.

Both dramas have main characters having double roles. In Mask, it's FL who has a doppelganger who looks exactly like her. In Last Summer, it's ML who has identical twin brother.

I think plot sounds similar only a little

- doppelganger identity switch as Poor FL has to impersonate the other identical person as she died
- plenty of twists, thriller

The whole hidden identity concept. Both couples have good chemistry, and the female leaders are mature.

-contract marriage
-family drama
-both FL enter ultra wealthy families not knowing how to navigate the change
- both have evil sister/brother in laws trying to obtain power/more wealth and sabotaging FL/ML

Mask is wayyy more serious than Wedding Impossible but it is good for those who enjoy marriage contract tropes! It's one of my favorites!

Seung Hee, after losing his girlfriend in a tragic accident, left for 3 years. When he came back, he sought to make a film in a rural area. Someone caught his eye - Bok Shil, who looks exactly like his deceased girlfriend, Hye Soo. Seung Hee followed Bok Shil in order to get some answers and ended up falling for her.
Still the questions remain, is he attracted to Bok Shil because of the memories of his ex-girlfriend, or does he like Bok Shil for who she is? What happens when competitors come into the picture and families opposing their love?

Le Jun Kai is a man who lives his life trying to foster a hatred for his enemy and devising ways to seek revenge for his former lover and unborn child. He decides to marry his enemy's daughter, Le Yi, and then proceeds to mistreat her and make her life as miserable as possible, but yet she bears this without retaliation. A problem arises when Le Jun Kai begins to realize he might have feelings for Le Ye Zi.

both of them have similar story of double Identy or Twins hhmmmm amazing soundtracks, nice actors, a lot of misterous to solve

In both shows:
1. Female lead os attempting to find out her identity. In LMIH, FL lost her memories and she's trying to get them back. In Mask, FL must study the life of the girl whose life she took over in order to survive.
2. Female leads are active protagonists of the story, meaning they are always taking action.
3. Female leads are in a difficult position, with the antagonists targeting them.
4. Male leads are both protective over the female lead, but they aren't forceful and allow them to make their own decisions. They also have issues with one of their parents.
5. Female lead lives in the lion's den. Meaning, she's constantly surrounded by antagonists and danger.
6. Both shows are heavy on intrigue, so they can be a bit slow paced.
7. Events are explored and understood through the use of flashbacks.

Both FL hide their true identity from the ML. The FL don’t come from welathy families. The ML are not happy when they find out the truth.

Both dramas has doppelganger concept. The doppelganger is always asked to fill in someone important place and they do a really good job at it. also this different in aspect that there is more romance here then in switch.

Aizawa Naoya is happily married to his colleague Natsuna but faces temptation to cheat on his wife when a new employee Tachibana Noa joins his branch and seduces him repeatedly with all sorts of antics. Adapted from the manga series "Anata Wa Watashi Ni Otosaretai" written by Miyaguchi Jun and illustrated by Umesuzu.

Both include a contract marriage and love after marriage.
Both dramas have a villain that is constantly on their backs and having an attempt at their life.
Both dramas start with a car crash that changes everything.

- Both have a cold ML;
- in both dramas, the leads are in an arranged marriage;
- both dramas are romantic thrillers.

Sakahira Riku, a first-year high school student, is jokingly pushed on the shoulder by his friend Tasaki while swimming by the pool, and falls into the pool with Mizumura Manami, who is next to him. The next day, when he wakes up, he finds that his body has been swapped with Manami's. Both are confused and try everything to get back to normal, but nothing works. They are forced to desperately exchange information about their families, friends, club activities, etc. in order to play the role of each other.