After work, I invited three of my junior coworkers over to my place for our usual "thanks for your hard work this week" party. We got way too carried away, everyone quickly fell into a horny mood, and before long we were all completely wasted. Among them, the new hire Yui-chan started off shy and reserved, but gradually got more and more into it, eventually staring at me with such a lustful gaze. I couldn't hold back any longer and fled to the bathroom, only for Yui-chan, her face bright red, to suddenly burst in after me—this was bad. "Senpai, are you turned on? Let me help you jerk off♪," she said, and I nearly lost my mind. Somehow, I managed to get the other two juniors back to the room without them finding out... or so I hope. Later, while I was half-asleep from exhaustion, Yui-chan suddenly climbed on top of me, pressing her tits against me. "Senpai... wake up~ let's continue from earlier?" At that point, there was no turning back. After that, we kept fucking all around the room. I was nervous about getting caught, but that tension only heightened my excitement, making it impossible to stop. Yui-chan was incredibly sensitive, moaning "Senpai... deep inside... ah, it feels so good!" as she squirted repeatedly, drenching her coworkers' faces and bodies with her fluids—but they were sound asleep and didn't notice a thing. I got even more turned on, pounding her harder and harder. I never imagined my junior Yui-chan could be this slutty. I'm definitely making her my regular fuck buddy—I want to keep doing this forever.