Cinderella's Sister (2010)

Symphony of Fate is the chinese version of Cinderella's Sister.

Miyuki is a timid florist, frustrated with her non-existent love life. While down on her luck she runs into an old classmate (and crush) of her's on the street. Things are going great when her younger sister, Haruka, who has taken away every guy that she's ever liked, begins to weasel her way between them. Can Miyuki overcome her obstacles and fight for the man she's loved since high school?

Same concept (recycling old folk tales), different vibe. Cinderella's sister twists around the story of Cinderella, making you sympathize with the sister in a melodramatic tale. Alice in Cheongdamdong gives Wonderland a Korean name, and the White Rabbit a very nice human body in a not-sure-if-comedy-or-what story.

A modern day adaptation of Cinderella with a twist as our Cinderella, Goo Hyo Sun, is loved by everyone whereas her stepsister, Eun Jo, has a dark past and struggles with the fact that her mother starts to care more for Hyo Sun than her.

In both, there are complicated family problems, drama, and the stepmother has a strange hate/love with her step-son/daughter

Both drama are about a girl who lives happily with her father until he remarries with an evil stepmother who has an evil daughter and who make the young girl's life a living hell.
Though in Cinderella's sister, it's about the stepsister who's not that evil

A modern day adaptation of Cinderella with a twist as our Cinderella, Goo Hyo Sun, is loved by everyone whereas her stepsister, Eun Jo, has a dark past and struggles with the fact that her mother starts to care more for Hyo Sun than her.