Today, as usual, I invited three juniors over to my place for a "Thank you for another week's work party." We popped in some heavy stuff in the spirit of an after-work session, and before we knew it, everyone was covered in so much lol. We got carried away and started playing an erotic game, and Yui seemed shy at first, but she gradually got into it... She's only a new graduate, but she's giving me sexy looks, so I just couldn't hold back any longer...lol. I said "I'm going to go jerk off for a bit lol" and ran into the bathroom, and then Yui, with her face all red, burst in, and it was dangerous lol. She said "Are you horny, senpai? /// I'll help you jerk off ♪" and I nearly lost my mind lol. I managed to get back to my room without the other two juniors noticing...I think lol. After that, I was tired and went to sleep, and Yui said "Senpai... wake up~ /// Shall we continue from before...? ///" and she pressed her boobs against me, and I was totally rock hard...lol. From there, we moved all over the room, fucking nonstop. I was worried that I wouldn't be found out, but that made me even more excited lol Yui-chan was so sensitive that she squirted like crazy, saying, "Senpai... deep inside... ah, it feels good...! ///" and it got all over my colleague's face and body, but he was fast asleep so he didn't notice lol. This made me even more excited and I started pounding him hard. I didn't know my junior Yui-chan was such a naughty girl... lol. I'm sure we're now friends with benefits lol.