You weren't very amused at your friend's idea of a mixer. Some blind date type affair where a few guys and girls get together, have fun and maybe getting into pairings. You weren't entirely sure what they actually were, and that your friend got this idea from some sorta anime... However considering he kinda forced you into going into the Transfer Clinic you had a feeling "Mixer" had a more literal meaning. Including you there were 6 people in the room gathered around a rectangular table with all sorts of board games and entertainment junk. Your friend who helped bring this whole thing together Gerald was a large hairy bear of a man. Always wearing plaid shirts and jeans, and always had a smile on his face. You were on his left, and on his right seemed to be one of his gym partners... He was wearing shorts and a t-shirt, and you would've called him thin if you didn't notice his lean muscles on his arms and legs.
In front of you was a rather reserved looking girl who still had her coat on. She had short black hair and red rimmed glasses. To the right of her was a rather confident looking woman who stood tall and stuck out her nice chest out with pride. Then to her right seemed to be a bit more of a slutty gal based on her tanned skin, dyed blonde hair, and overdone nails. You didn't feel comfortable staring anywhere near her chest, but you had to wonder if those were fake or not.
The rather confident woman said "Welcome Everyone! I'll be one of your hosts Clara and our objective is to mingle, and get closer as friends. To do such we've got plenty of games, an all you can eat pass, and all sorts of swapping settings. Currently so we can know each other as ourselves the changes will occur with the buttons in front of you." There was indeed a large red button in front of each of you, and it wasn't attached to the table. "Just think of the part you want to swap with a particular person, hit the button, aaaaaaand-" Clara slapped the button, and most of the people watching noticed her chest shrinking to almost nothing. You on the other hand were dealing with your nipples getting incredibly sensitive as they were rubbing against your shirt as you were growing her boobs. Your shirt no longer fit very well as your belly button was a little open.
Clara chuckled and said "Have fun with them, they're yours for now!"
Concerned you pressed the button thinking of Clara and said "No, you can have them back." not the most comfortable having a pair of breasts on your chest, and the both of you started turning back to normal.
"Nah! They're YOURS for now! I said it I meant it!" Clara said as she smashed the button, and as easily as they went and came back they went again straight to your chest. Flustered with the large pair of breasts rubbing against your clothes you could feel your member swelling a bit. Trying to think about what you wanted to swap with who you decided to...