One day while I was at work my girlfriend shot me a text: “Get your phone airpods and a black bag I packed for you and go to the bathroom, FaceTime me when sit down at a stall” I complied, taking my phone airpods and a mysterious black bag my girlfriend packed for me that day. Called her once i was there. “Hey babe, I want to get you excited before lunch, you have five minutes?” I nodded. “I just love what a compliant little sub you are, you always do as you ask and I just love it when you wear panties” “Are you starting to feel stiff” I nodded, I was rock solid already. “But today let’s do something different, I’m going to be the sub and you can be the dom”. I was timid but she reassured me “all you have to do is nod” As she stood up so I could see her I noticed she was also in her office bathroom, albeit a private bathroom for one person. “Do I need to take my panties off for you master? She asked? I nodded. As she started to take her panties off my dick throbbed. She took them off and wrapped them like a bracelet around her wrist. “Should I also take off my bra for being such a bad girl?” I nodded. As she took her bra off I came close to cumming but was able to hold it together. “Should I lift up my skirt so it’s shorter master” I shook my head to signal no. My girlfriend walked back over to her phone. “What, you’re getting to exited, thinking of me wearing a little tiny skirt with no bra of panties to work all day, worried my boss might see my nipples through my shirt of up my skirt?” “Stop” I uttered but it was too late. I came all into my boxer briefs and I sat there in dispair. “Babe did you cum?” I nodded “This is why I have to be the dom babe, I packed you a pair of panties and cage in case this happened, put them on and return to work” I opened the bag to find a tiny cage and a pair of cotton panties. I cleaned myself up, caged and put on the panties on. The panties were of course pink and the cage came with a lock but no key as per usual. I returned to work with my cock now throbbing in this tiny cage, thinking of my girlfriend returning to work without her bra of panties.