Strawberry Fields(2006)

A car accident occurs in Tanabe, Wakayama Prefecture. Natsumi's (Aimi Satsukawa) classmates Maki (Mitsuki Tanimura), Risa (Yuria Haga) and Mika (Ayu Higashi) die in the car accident. Natsumi becomes isolated at school. Her three friends then come back as ghosts.