Gift: Eternal Rainbow (2006)

The seaside village of Narasakicho is special in a number of strange ways. Crowned by an eternal rainbow, the village is rumored to grant all of its residents a once-in-a-life-time magic ability called a "gift". When two hearts are in-sync, the gift of an aspiring love will manifest itself in a wondrous and magical way. A student named Amaumi Haruhiko finds himself entangled in the village's special magic in his 2nd year of high school. His new school year starts with the return of his cute adoptive sister, a morning misadventure with a broom-riding witch and encounters with a number of other cute fellow students.