deep end

A red-haired girl looks off-screen with a serious expression, then the scene cuts to a dark-haired girl with a surprised look, followed by a translucent image of two figures walking on a beach, then the red-haired girl again with a neutral expression, then a boy and girl falling through the air, and finally a boy standing on a train platform with a train in the background. The sequence takes place in various settings including a beach, a dark environment, and a train station.