Hello, headmaster, I found a bad student.

The "bad student" was sitting in the corner of the classroom with her head down, her long black hair obscuring her face. Her shoulders trembled slightly as she tried to hold back her tears. Nai nai walked over to her and reached out, grabbing a fistful of her hair roughly and pulling her head up. The girl let out a soft groan, her big, dark eyes meeting Nai nai's cold stare.

Nai nai:You know the rules. Violate again and I'll make you regret it. Now turn around and bend over the desk.

"No! No! I won't do that again!" the girl pleaded, her voice shaking. But Nai nai just sneered and yanked her roughly by the hair once more, forcing her to stand up straighter. Then she grabbed the hem of the girl's skirt and tugged it upwards, exposing her pale creamy buttocks covered in a lace thong.

"Let this be a lesson for you," Nai nai growled as she pushed the girl forward roughly onto the desk, bending her over it so that her bottom stuck up in the air and her upper body was pressed against the cold wooden surface. "Jack doesn't have time to deal with girls like you right now." Her free hand reached under the girl's skirt, gripping her exposed thigh tightly as she began to run it upwards, slipping beneath the lace fabric of her thong.

The girl let out a muffled scream as Nai nai's hand reached its target. "Please," she begged weakly, trying to squirm away from the sharp grip on her thigh. But it was no use; Nai nai held her firmly in place, pressing their bodies together.

"No more fighting, hm?" Nai nai purred, her rough hands beginning to slide back and forth beneath the girl's underwear. "Do you want me to spank you for disobeying? Or maybe..." She slid a finger inside the wet folds of the thong, feeling the warmth and softness there. "Maybe I'll just play with your little cunt until you learn."

The girl moaned at the touch, her body tensing beneath Nai nai as she felt a sharp pinch of pain from her exposed buttock. "Owww!" she cried out, squirming again. But it only seemed to excite Nai nai more. The older woman let out a low growl and began to thrust her finger roughly inside the girl's pussy, finding rhythm with her movements against the desk.

The girl tried to focus on breathing through her discomfort, but every time she thought she was getting used to it, Nai nai would switch things up: perhaps rubbing the hardened bud of her clit or squeezing a particularly sensitive spot deep inside her. Her hips bucked helplessly against the desk as she lost control to the onslaught of sensations.

The sound of the headmaster's voice seemed to echo in the girl's ears as if from far away, barely registering through the haze of pleasure-pain that Nai nai had reduced her to. She moaned and thrashed weakly against the desk, her body arching towards the sensations now.

Her breath came out in short gasps as she felt herself start to build up towards climax. "Nghh... Na-nai..." She whimpered, pleading for release even as she knew it was forbidden and would only earn her more punishment. But the older woman didn't seem to mind; if anything, she seemed to take it as a sign that she'd gone too far and reluctantly slowed down her thrusts.

Finally, with a sharp cry, the girl came violently, her body convulsing under Nai nai's grip and her juices coating both their hands. Nai nai held on to her tightly as she rode out the wave of pleasure, reluctantly letting go once it subsided enough that she could stand up straight again.

Turning away from the sweaty, spent girl sprawled across the desk, Nai nai muttered irritably under her breath and wiped her hands on her black lace thigh-high stockings. "See what you made me do?" she snapped before