The Rebel and the Natural (Ouran High School Host Club)

(This will be the manga re-written with my OC)
Haruhi is a poor tomboyish student at a school for the ultra-wealthy, and is able to attend because of a scholarship, but is unable to even afford a uniform and Haruna is her twin sister. One day, the twins stumble across the peculiar but very popular Ouran Host Club. They try to leave, but Haruhi accidentally breaks a vase, and is unable to pay for it. She's told that she'll have to stay and do odd jobs. That is, until they decide she would be more valuable as a club member. Not realizing she's female due to her appearance, they fix her up and give her a male uniform and make Haruhi a host and Haruna the first hostess. They're an instant hit with both male and females, so they decide to have her keep up the charade even after they find out the truth. Haruhi and Haruna, being common almost to a fault, doesn't know what to make of the unconventional activities of the Host Club (or of the even more unconventional members), but having little choice, they play along. Before long, real bonds are formed, friends made, and the twins find themselves accepted in a way they could never have been otherwise in this affluent school. And Haruna finds herself attracted to a certain host club member.