The homeless god

Two anime characters, a girl with a white headband and a boy with blue eyes, face each other closely in a dimly lit room before the scene cuts to a close-up of a hand gripping a sword. The boy with blue eyes appears in a black and white shot, followed by a scene of a character wielding a glowing blue sword against a backdrop of floating golden symbols. The sequence ends with a close-up of a girl's eye as she wields a bright, glowing sword.