Troubles in math class❤️‍🔥

                                    

                                          
Billie - g!p, dom/sub, 17 years old, blue hair
Y/n - dom/sub, 17 years old 
TW: humiliation, smut
Word count: 4770
Billie's Pov:
I sat in math class beside my girlfriend, as Mr. Granger began the lesson without wasting any time. He dove straight into the topic of the day, writing a series of complex equations on the board. 
I tried to focus as much as I could, writing each step in my notebook. My last test hadn't gone well, and I couldn't afford to screw this up. I glanced at the textbook, determined to follow along with whatever he was explaining.
Out of corner of my eye I noticed y/n shift around in her seat. I thought that maybe she couldn't see what was written on the board since we were sitting at the back. But then I felt her fingers brush against my thigh under the desk. At first, I tried to ignore it but her touch was getting more and more intentional. With each move her hand went higher and her fingers gave my leg an occasional, light squeez. I shot her a look and raised an eyebrow as a silent warning, hoping she might get the hint to stop. Then I turned my attention back to the lesson. 
But instead of giving up she leaned in. "Mmm you look so focused, babe" Y/n giggled quietly. "It's kinda hot.., but maybe later you could focus on me" She whispered, her voice getting seducive when I felt her lips brush against my ear.
I swallowed hard, feeling my cheeks heat up. I was trying so hard to stay focused, but Y/n was making it impossible. My hand gripped my pen tighter, and I forced myself to write down the next equation Mr. Granger scribbled on the board.
But Y/n's stubborn ass wasn't gonna let her leave me. Her hand got higher and through my sweatpants her fingers brushed my yet soft dick. I couldn't hide the fact that this particular motion was enough to make me let out quiet moan, stiffen by biting my lip.
"Y/n... please stop" I breathed out havily, feeling the familiar heat pooling in my lower stomach. Please not now. It could have happened anywhere else but not in the fucking classroom. "Someone's gonna catch us" I continued, barely being able to think about something else then Y/n and my slowly but surely growing boner.
She quickly looked around class. Then at the teacher who stood with his back to us, to eventually land her gaze back on me. I locked eyes with her for a split second and from the smirk tugging at her lips I knew she was having fun. "No one's watching, Billie" She murmured, her lips brushing against my ear and then placing cute, little kiss on my cheek. "You make me wet" She breathed out. Her voice dropped lower and a shiver jolted through my body.
I felt my breath hitch as Y/n's words sank in, sending a fresh wave of heat through me. I swallowed hard, my mind raised as the sentense echoed im my ears and with a shaky move of my hand I nervously flicked my blue hair trying to regain my composure. Before I could even think of response, I felt her soft lips ghost over my ear again.
"You little, horny slut" I whispered through gritted teeth, keeping my gaze locked onto the board. Out of the corner of my eye I saw her smirk and seducily lick her lips. I couldn't focus on the math at all as the pressure and unbareable throbbing in my pants was only getting worse. I looked down and my eyes widened when I saw my very visible hardness. "Fuck..." I cursed under my breath and tried to cover it with my hoodie and by fixing my sweats, but I stared getting more and more embarressed as it seemed like it wasn't looking anything better. 
Y/n stared at me all the time with playful spark in the eye. I heard her chuckle at my nervous shifting. "You're little friend is being needy, huh?" She teased and her fingers stroked my hard cock through the fabric. This time I wasn't able to hold back and a low groan escaped my mouth. I coughed right after trying my best to cover it. How the hell was I supposed to think about math when Y/n was doing this? "Babe, seriously... I'm begging-"