Oversize Love (2020)

Both femal leads:
1. Are/ were fat
2. Try to lose weight to chase the boy they like
3. Use an English name to leave their past behind
The movie and the drama both are almost around the same concept

Because of an unexpected opportunity, Lin Xiao Xi who used to be an overweight girl transforms into a beauty named Alice, thus starting a story full of twists and laughs when she is caught between her childhood friend and her lifelong crush.
Lin Xiao Xi is an optimistic and cheerful girl who loves chasing after celebrities. She lives happily on an island and runs a photography studio that is doing pretty well. The only drawback is that Xiao Xi is a bit fat! Her peaceful life is stirred by the appearance of male idol Huang Ke who reignites her determination to lose weight. Just as expected, she fails in her endeavor yet again.
By chance, Lin Xiao Xi comes across a magic potion that can allow her to magically lose weight. After her transformation, Lin Xiao Xi uses the pseudonym Alice to approach Huang Ke. Meanwhile, her childhood friend Han Bing repeatedly blocks her attempts to get together with Huang Ke. Ever since they were young, he has always been by her side and has gradually come to understand his underlying feelings for his best friend.

In both the female character recives a bottle with a "magic" content that make them slim (on perfume she becames her old self that was a modelo (before getting pregnant).
In both overcome themselves. However in Perfume it became a verter like "Change".

They are similar because in both female lead wanted to be beautiful and it has come true but it was only temporary.

FML was also fat and goes under a transformation, to change all her misfortune and still win the MLs attention.

In both female lead wanted to beautiful in order to get a man or true love. However everything has some price.

They are similar because female lead became beautiful but everything has some price. So if you like one then you might like the other.

The female lead is overweight then finds out her boyfriend is cheating then taking her on the path of weightloss with a famous fitness trainer. Along the way they fall for eachother and have the cutest chemistry! Highly recommend it!

Because of an unexpected opportunity, Lin Xiao Xi who used to be an overweight girl transforms into a beauty named Alice, thus starting a story full of twists and laughs when she is caught between her childhood friend and her lifelong crush.
Lin Xiao Xi is an optimistic and cheerful girl who loves chasing after celebrities. She lives happily on an island and runs a photography studio that is doing pretty well. The only drawback is that Xiao Xi is a bit fat! Her peaceful life is stirred by the appearance of male idol Huang Ke who reignites her determination to lose weight. Just as expected, she fails in her endeavor yet again.
By chance, Lin Xiao Xi comes across a magic potion that can allow her to magically lose weight. After her transformation, Lin Xiao Xi uses the pseudonym Alice to approach Huang Ke. Meanwhile, her childhood friend Han Bing repeatedly blocks her attempts to get together with Huang Ke. Ever since they were young, he has always been by her side and has gradually come to understand his underlying feelings for his best friend.

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.

Because of an unexpected opportunity, Lin Xiao Xi who used to be an overweight girl transforms into a beauty named Alice, thus starting a story full of twists and laughs when she is caught between her childhood friend and her lifelong crush.
Lin Xiao Xi is an optimistic and cheerful girl who loves chasing after celebrities. She lives happily on an island and runs a photography studio that is doing pretty well. The only drawback is that Xiao Xi is a bit fat! Her peaceful life is stirred by the appearance of male idol Huang Ke who reignites her determination to lose weight. Just as expected, she fails in her endeavor yet again.
By chance, Lin Xiao Xi comes across a magic potion that can allow her to magically lose weight. After her transformation, Lin Xiao Xi uses the pseudonym Alice to approach Huang Ke. Meanwhile, her childhood friend Han Bing repeatedly blocks her attempts to get together with Huang Ke. Ever since they were young, he has always been by her side and has gradually come to understand his underlying feelings for his best friend.

Both are love stories between childhood sweethearts..
One of them was chubby... And was unsure of the feeling of the other..
The other one liked her, but was too shy to express his feelings.

Both are love stories, which starts with two childhood sweethearts. He is the chubby one at first.. a misunderstanding.. causes them to believe they don't like each other and years later when he is slim and famous..
They discover their feelings again.