Our role play just consists of either him being my master and I am his slave, or I am his mistress and he is my slave

Oh btw I'm 20 yrs old. I am a pale skinny 5'0 Asian, with straight long black hair (like the Grudge), and dark brown eyes with glasses.
B is also 20 (four months older than me), 6'2, has a tall strong medium built body, medium length dark brown hair, a goatee and beautiful blue eyes. Actually he looks like Rob Swire from Knife Party if you know who he is. ^^
So this happened just a few days ago I think. I was hanging out at his house and was going to spend the night there. Earlier in the day, I started to play with him because we like to switch roles of m/f and f/m. So actually I was planning on being his mistress and make him my slave later that night, but the mood kind of changed to him feeling more dominant... so then he became my master this time..

The role play started out with me dressing up for our games to look good for him. Since B and I LOVE anime, I wanted to buy a few things to resemble outfits of girls from anime beforehand to try to look cute for him... *blush* I put on black thigh-high stockings with white square beads that run up on the outsides of the stockings. Then I put on a short pink skirt with a plaid design with a little black lace on the edge..kind of like a schoolgirl skirt? Then I had a white shirt on. >///<
Anyway, he was very satisfied with my outfit (I hope). He ordered me to come sit on his bed, and as soon as I did, he pulled my ankles toward him, climbed on top of me, pinned my wrists against the bed and then started making out with me. After that sweet act, he pulled my shirt and bra off and started kissing and sucking on my bare breasts. Since my whole body is sensitive and not used to a man's touch, so were my breasts, which caused me to react by moaning and moving around, with my wrists pinned again. It tickled actually! ^^
Suddenly, he put his big hand over my mouth to stop my noise-making. I squeaked in surprise. Then he turned my head towards his which forced me look directly into his eyes.
"Master's going to have fun with his little pet isn't he...? Because your whole body belongs to me. Every single last part of it.", he whispered to me in a harsh, commanding voice.
After I nodded in fear and mumbled, "mmm-hmm!" in his hand, he got up and told me to stay there. He went to his closet, got a few things and came back with a pink collar and leash, a necktie, a pair of his boxers, and a pair of long black socks.
First he put the pink collar around my neck and used the leash to drag me around on the bed, to the floor and back on the bed again to tease me and make me do certain things for him... He then used his necktie to tie my wrists together tightly behind my back. Then he used one of his long black sock to cover my eyes and tied it behind my head, I couldn't see a thing.
Then finally he held me firmly in place and ordered me, "Open your mouth, princess.". I was hesitant and opened it a little (I like to play hard-to-get) Then he forcefully stuffed his boxer shorts as much as he could inside my mouth, ignoring my muffled protests, then tied the other black sock around my mouth and head to keep the gag in place.
I wasn't able to move freely, see or speak.
"Wow,", he said. "You just look so cute when you're helpless, princess."
Lemme know if you want to hear more of my first story..or at least what you think of it so far... >///<