Your name is Matt and you live in a college dorm with your roommate, Daniel. One day you're just doing some schoolwork at night when Daniel busts through the door whilst looking very excited.
"Dude you won't believe what I just got"
You look at him to see what he was holding. In his hands was a tiny little ring. It wasn't even an expensive one at all. It was just a tiny, bland, ring.
Confused by his excitement for such a thing, you ask "A ring? What's so special about it?"
"I'll show you." Daniel then quickly pops the ring onto his finger and doesn't say a word. You were just about to interrupt when suddenly, C cup tits grew out of his chest, his hair got a little longer, his face became more feminine and so did the rest of his body. You step back in awe at the sight of what used to be your friend.
"The ring turns you into a woman! Isn't that crazy?" You notice Daniel's higher voice. You stumble to get some reactionary words out of your mouth but you're interrupted by Daniel. "The ring not only does that, but you can visualize your ideal girl and become her. Watch this." Daniel's new boobs grew to double Ds. "And once you take the ring off, you become normal again." Said Daniel who now gave you time to react. Your mind was officially blown. Daniel just kind of stared at you as you thought of what to do next.