Himitsu no Ibara

Amagase Seiya, a girl with maxed-out "prince power," transfers into the all-boys boarding school "Golden Rose Academy" to protect the chastity of her childhood friend, Mikaboshi Raiki, who has become the "princess" of the boys' school. But right after enrolling, she catches the eye of the academy's most troublesome student...!? A lively, overly chaotic secret school life surrounded by handsome guys with all sorts of quirks is about to begin!

(Source: Ichijinsha, translated)