Himitsu no Hanazono

A shoujo-ai manga about a girl named Misono who falls in love with a handsome "boy" one day as she was taking a break from her running. She believes that she shall never meet this "boy" ever again, but after warnings about problems with her foot, Misono decides to not run for a while and help out with the drama club. There she meets her "handsome prince" once again, but it turns out "he" is not who she thought he was...

(Source: StarryHeaven)