matsusaka takeshi, heckler & koch, original, 2girls, 3d, bag, binoculars, bipod, black hair, bolt action, computer, computer keyboard, elbow pads, fingerless gloves, gloves, gun, h&k mp5k, laptop, loafers, long hair, lying, multiple girls, on one knee, on stomach, remington model 700, rifle, school bag, school uniform, scope, serafuku, shell casing, shoes, short hair, sniper rifle, sniper team, squatting, submachine gun, suppressor, twintails, vertical forward grip, weapon