"Hey Nakai, get in here!"
 
I had barely a second to turn and see Miki Miura in the empty classroom before she grabbed my collar and dragged me in, slamming the door behind me. She pushed me into Mr. Mutou's chair and hopped into my lap, viciously ripping my shirt open and running her hand over my chest, gently kissing my neck. Finally getting over the shock, I grasp her shoulders and pull her back a little to look her in the eyes.
 
"Miura... what's going on? Why are you in the classroom this late at night? We've never even had much of a conversation... OW!"
 
She slapped me in the face.
 
"Shut up, Nakai. I just want some fun, and Misha told me you and Hakamichi split up. She also said you were worth a ride, so quiet down, undo your pants, and let me."
 
She quickly pulled me into a deep kiss, thrusting her tongue into my mouth to make it clear this was pure lust, nothing more.  I ran my fingers through her long, dark hair as she pulled back and licked her way down my chest; I closed my eyes and let out a small moan as she dismounted, got on her knees, and swiftly extracted my growing erection.
 
"Seems Hakamichi had the right idea..." she murmured before licking up my shaft and gently kissing the tip. "It's even bigger than I expected. Well done, Nakai." She grinned up at me, kissed it again, then finally opened her mouth and took me all the way in. My eyes rolled back in my head as I attempted to keep some semblance of consciousness, her tongue rapidly dancing around every millimeter as her head bobbed up and down on me.
 
As quickly as it started, however, it was over, a faint popping noise audible as she removed her mouth from my throbbing member. "Now the fun part..." she whispered into my ear as she climbed back on top of me, deftly pulling off her bloomers, gripping my shaft with her hand, and resting her stump on my shoulder. She carefully guided me inside her, letting out a moan of her own as she engulfed me. This time I pulled her into a kiss, my free hand massaging her ample breasts through her shirt as she started to speed up, her toned hips showing off their power as she needed no help from me at all. Her eyes fluttered in pleasure, unexpectedly showing her feminine side despite her clear dominance of the situation.
 
As I started to get close to a climax, though, I reached an unfortunate realization that in all the rush, we both must have forgotten. "Miura, I'm not wearing a... OW!"
 
She slapped me again. "I told you to shut up, idiot. I'm on the pill, so stop worrying and fill me up. Fuck, I'm just about there..." She closed her eyes and moaned louder, bucking even harder as she started to orgasm. Feeling her convulse around me, I let myself go and thrust upwards into her, a wholly unnecessary action but one that helped me finish nonetheless, finally releasing my seed into the quivering girl I had barely known before tonight.
 
I lie back and start panting, totally exhausted from the unexpected incident. Miki, however, needed no such recovery, hopping off right away and pulling her bloomers back on, a dark wet spot forming around her crotch right away. "Not bad, Nakai. Work on your endurance, though. Next time I'll want at least two." She smirked again and walked out of the room, leaving me with a ripped shirt and way too many ideas.