I was wondering if anyone can help me find a story to re-read

Main Points

- Main girl is from a rich family

- Parent died and is left with grandfather

- Decides to take tradition and start from the begining of nothing

- Finds an apartment and a job and join regular school as a normal teenager.

- She catches Kai attention who also comes a well known family

- Kai is a bad boy who falls in love.

- He wants to be with her and to prove he is worthy he also start from the begining

- Not sure if they end up together 

Please help me find this story!!!