Adventurous first lecture of the semester [Story]

I decided that i will share my write up's of stories here before posting on reddit as a little extra. This is a story from last week when my university lectures started and a silly little adventure.

I always share like the crazy stories i do with fwb's (when they happen, lately its also calming down) but kinda rarely the silly and fun ones with my girlfriend.
Like i didn't get fucked or covered in cum and used like a slut what you guys seem to love, instead i submitted to her and my biggest kinks in a safe but fun way. Enjoy the story

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Each semester, I aim to make a impression in my university lecture—cute, nerdy, and just naughty enough to get that thrilling tingle of public humiliation I secretly crave. It’s my way of connecting with open-minded folks who might catch the hints. This year, I turned a favorite cosplay of mine into a casual outfit for the first lecture. Not the full setup: no wig, no elaborate costume, but if you know the character, you’d spot it instantly. That was my nerdy vibe. The naughty part, though? That’s where things got spicy.

I’ve been leaning into petplay with my girlfriend lately, and she suggested I wear the shiny red dog collar from my ex. It matched the red tie in my outfit perfectly, not too out of place, but a dog collar isn’t exactly a standard accessory. We settled on a puppy aesthetic for the naughty edge. No puppy ears, sadly, but my girlfriend handed me a tail with a wicked grin. “I don’t care how you do it, but wear it,” she teased, mocking my reflection in the mirror as I saw it poking out under my skirt. I taped it up carefully, but the thought of the tape loosening, and the tail being noticed had my heart racing. To top it off, she slipped me our favorite toy: a discreet vibrator that tucks into my panties, controlled by an app. “Connect it and keep it on,” she ordered. “If I catch you turning it off, you’ll regret it.” I obeyed, feeling excitement as I headed to class.

The first half-hour was tame enough. The plug was a constant, subtle pressure as I sat, but I could handle it. The collar drew a few glances during introductions, but no one said a word, and I started to relax. We went through the usual syllabus talk, and I was settling in, until I felt a buzz between my legs. My girlfriend had flipped the vibrator on. It’s designed for public use, whisper-quiet, but in my head, the humming was clearly to hear. My pulse spiked, cheeks flushing as I tried to focus on the professor’s lecture plan. Was it loud? Could anyone hear? I gripped my pen, forcing a neutral expression.

Five minutes passed, and the low buzz didn’t stop. My girlfriend was teasing me, playing with my clit in the middle of a packed lecture hall, not even knowing if I’d have to speak. Then she cranked it up, switching to a maddening pattern—low to high, lingering, then back down. My thighs clenched under the desk, and I bit my lip, imagining the hum echoing to everyone around me. The girl next to me, doodling some seriously impressive art, glanced over. “You okay?” she asked, her tone curious. Did she hear it? Did she know? I nodded quickly, heart pounding, and she went back to her sketch, leaving me to squirm in silence.

The teasing went on for over half an hour, the vibrations relentless. My panties were soaked, and I couldn’t focus on a word of the lecture. Every pulse pushed me closer to the edge, but this toy never quite gets me there—it’s frustratingly perfect for edging. Finally, I couldn’t take it anymore. I excused myself to the bathroom, and called my girlfriend. “I can’t focus,” I pleaded, voice low. “No removing,” she said firmly. “But if you cum, I’ll turn it off.” That was the deal. The toy alone wouldn’t finish me, so I pressed it tighter against my clit, and teasing myself with the plug just enough to tip me over. I bit my hand to stay quiet, cumming hard in the university bathroom, the thrill of the setting making it even more intense.

“Good girl,” my girlfriend praised me through the phone as the vibrations eased. “Now try to learn something instead of being a horny mess, dumb slut.” She hung up, and I took a breath before fixing my skirt, and slipped back into the lecture.