Mariko smiled, her eyes pointedly fixed on sky. A skilled observer of faces would've noticed a waxy, glassy quality to the smile. It had waaay too many teeth pressed too tightly together to even qualify as a smile. Mariko was a bad actor at the best of times. She sidled away from the window and out of it's view. Once out of the way, she dived for her desk. There wasn't anything suitable Not even the mop with the stupidly long handle she kept behind the door would reach that far, and she, Mariko, couldn't aim for peanuts. She grabbed what she was looking for: A rubber band. Perfect. She wrapped it around a few of her fingers, and grabbed a new piece of paper and folded it sloppily and haphazardly into a thick rectangle shape, a hornet. The schoolgirl's friend. She made three more, in case she missed with the first few. And fashioned a crude cone out of yet another sheets of paper, as a megaphone. 

Mariko peeked over the window and stared at her target, a short hunched figure in the trees. He was squatting on a branch, hands disgustingly near his crotch. She loaded the makeshift [url=http://www.wikihow.com/Make-a-Paper-Hornet]catapult[/url], and fired. It sailed clean over the pervert's head by a good few metres. Not a problem. That was why she'd made spares. The second got caught in a crossbreeze and passed to the right, but the third struck the boy. The distance made it to far to see precisely where, but she shot another one in the same direction to be safe. Then she grabbed the makeshift megaphone, and yelled.

"Would the sick Hentai fuck please stop peeping through the girls windows!?"