Koe no Katachi

A girl with pink hair stands in front of a window with horizontal bars, while a boy in a dark uniform crouches and then stands, making a hand gesture that projects a glowing white kanji character onto the glass; the scene shifts to a close-up of a hand forming a symbol, then to a boy in a school hallway who looks surprised as the same glowing character appears behind him, followed by a close-up of a hand holding a glowing object.