Boys Over Flowers, Vol. 10 by Yoko Kamio
Rich boy Tsukasa returns to Japan after he discovers the true identity of Tsukushi's "Kinsan." Tsukushi herself is having trouble accepting his identity. Then Kinsan invites Tsukushi to a swank party where they bump into Tsukasa, who causes a major scene when Kinsan declares his intentions toward Tsukushi! Still desperate for money, Tsukushi goes to Tsukasa who comes up with a plan that everyone can benefit from. That is, if Tsukushi can win a beauty contest...!