Ai Ore! Love Me!(2007)

Ai Ore!: Danshikou no Hime to Joshikou no Ouji

Now that all St. Nobara Girls Academy knows Akira is a boy, the students want Mizuki to stop dating him because of Dankaisan Boys School’s awful reputation. Pressured by her classmates and the student council president, Mizuki decides to do the unthinkable: she goes to Ran for help.

(Source: VIZ Media)