Haruto is already adjusting for a new shot, prepared to fire again, when that scraping sound is heard. He freezes for a moment, panic and fear starting to rise within him, but then motion comes back to him and the rush of adrenaline hits and he's spinning around and leaping back, prepared to unleash a hail of magical bullets at whatever it is. Presuming it's the kind of thing that should be filled with magical bullets.