Maria Holic Vol. 13 (manga)

It's been ten years since Kanako's older sister, Yume, has paid a visit to Ame no Kisaki. But when she arrives and sees Mariya, she instantly sees right through his disguise! Kanako, unaware of the drama with Mariya and her sister, reluctantly goes on a first date with the student council vice president of Hoshi no Mori at the joint school festival!