Diamond Lover (2015)

Due to her larger size, Mi Duo has always lacked confidence as her appearance has always caused her to face difficulties in her daily life. She falls in love at first sight when she sees Xiao Liang, a jewelry company president. However, seeing how there is no way they would ever match in appearance, she doesn't engage in a pursuit. A car accident forces her to go under surgery, one of which is cosmetic surgery. After the surgery, she has transformed into an ideal image of herself. Now with more confidence, Mi Duo successfully lands a job at Xiao Liang's company. She goes through success and failure in work, experiencing life very different from what she had been used to. With her friend, Lei Yi Ming, a surgeon, supporting her every step of the way, she begins to realize that appearances are just surface-level qualities and that there are more important things to strive for on the inside.

Similarities :
+ Plastic surgery
+ Hidden identity
+ Fat to fit
+ Unrequited love
+ Beauty standards

Very similar stories! Both have an overweight unconfident woman who gets into a car accident and has to get surgery, and becomes beautiful. I hugely recommend this Kdrama!

Both are played by talented actors and actresses. The female lead both chased the male lead first. The main female characters are equally persistent. The main female characters both rely on their talents rather than sheer beauty.

the two tell a love story at work. Mi Duo (FL diamond lover) tries to become an expert jewelry designer?while Qi Qi (FL sweet dream) tries to become an Ikebana expert. FL both have a cheerful and funny nature

Both of these drama have similar female character and they have the same vibe of happiness.
Birth of beauty is on a house wife transformation and how she finds love .

Romantic comedy love story between Korean man & Chinese woman. Rain was in a movie too with Crystal Liu Yi Fei called Love or Money. A must watch intercountry romance drama.

Due to her larger size, Mi Duo has always lacked confidence as her appearance has always caused her to face difficulties in her daily life. She falls in love at first sight when she sees Xiao Liang, a jewelry company president. However, seeing how there is no way they would ever match in appearance, she doesn't engage in a pursuit. A car accident forces her to go under surgery, one of which is cosmetic surgery. After the surgery, she has transformed into an ideal image of herself. Now with more confidence, Mi Duo successfully lands a job at Xiao Liang's company. She goes through success and failure in work, experiencing life very different from what she had been used to. With her friend, Lei Yi Ming, a surgeon, supporting her every step of the way, she begins to realize that appearances are just surface-level qualities and that there are more

Due to her larger size, Mi Duo has always lacked confidence as her appearance has always caused her to face difficulties in her daily life. She falls in love at first sight when she sees Xiao Liang, a jewelry company president. However, seeing how there is no way they would ever match in appearance, she doesn't engage in a pursuit. A car accident forces her to go under surgery, one of which is cosmetic surgery. After the surgery, she has transformed into an ideal image of herself. Now with more confidence, Mi Duo successfully lands a job at Xiao Liang's company. She goes through success and failure in work, experiencing life very different from what she had been used to. With her friend, Lei Yi Ming, a surgeon, supporting her every step of the way, she begins to realize that appearances are just surface-level qualities and that there are more

Due to her larger size, Mi Duo has always lacked confidence as her appearance has always caused her to face difficulties in her daily life. She falls in love at first sight when she sees Xiao Liang, a jewelry company president. However, seeing how there is no way they would ever match in appearance, she doesn't engage in a pursuit. A car accident forces her to go under surgery, one of which is cosmetic surgery. After the surgery, she has transformed into an ideal image of herself. Now with more confidence, Mi Duo successfully lands a job at Xiao Liang's company. She goes through success and failure in work, experiencing life very different from what she had been used to. With her friend, Lei Yi Ming, a surgeon, supporting her every step of the way, she begins to realize that appearances are just surface-level qualities and that there are more

Yumeko used to be bullied for being bigger than other girls, but after she almost dies in an accident and awakens with no memories, she decides to turn her life around?by living happily in her own skin and even going after the one she loves.

Ami, a backpacker from Japan who is four years older than high school student Jimmy, shows up at his part-time job. The two end up spending the summer working at the same store, but Jimmy gradually develops a faint crush on Ami. The two of them grew closer as they rode motorcycles together at night and went to the movies, but suddenly, Ami decided to return to Japan. Ami proposes her "one promise" to Jimmy, who can't sort out his feelings. As time passes, Jimmy visits his parents' house for the first time in a while and finds a postcard that Ami sent him 18 years ago when she returned to Japan. Jimmy's memories of his first love come back to him, and he takes his first solo trip to Japan to confront his past and examine his present. Jimmy rides the train while listening to songs that remind him of his memories with Ami, and he heads to her hometown. Will Jimmy be able to reunite with Ami?

ML is an actor but not too popular anymore & broke so he rent a room in FL house.
FL is a nerdy geeky/otaku girl who like to imagine & day dreaming about romance with her favorite manga/comic book character. Remind me of Rainie Yang & Jiro Wang drama....& still 1 of my favorite drama....If you like this genre this is a must watch romance comedy drama....

I haven't seen my ruby my blood but it seems like it's both talking about jewelry and jewelry design

Serinuma Kae is a chubby high school girl who loves BL manga. One day her beloved character dies, and the girl falls into depression. For a long time, she cannot even eat, which leads to significant weight loss. But to her own surprise, the updated Serinuma becomes very popular at school, and she immediately has four handsome admirers at once.