Ugly Duckling to Swan, Bijin Kakumei Recommendations
The plot is almost the same. It's about a girl who at first isn't so pretty at first but later turns into a beautiful girl. She's bullied about how she looks by a guy and when she soon becomes beautiful she seek revenge against the guy that bullied her. Bijin kakumei is more of a cute kind of manga while ugly duckling to swan is more of comedy.