Ouran High School Host Club Vol 3

Ouran High School Host Club Vol 3 by Bisco Hatori. A Shojo manga rated Teen, published in English by Viz Media in 2006.

Scholarship student Haruhi Fujioka is looking for a quiet place to study when she stumbles into the Ouran High School Host Club and breaks an extremely expensive vase. To pay off the debt, she has to work for the club's wealthy, eccentric boys, who assume she's a boy too.