A crimson necklace caught Terra's eye. It was made of some kind of red leather with several small red metal disks attached to it. She thought it looked interesting, plus it felt warm in her hand. To her disappointment, nothing happened when she put it on but she liked the way it looked so she left it there. Nothing else in the box looked interesting, so Terra hid it under her bed. For the rest of the day, she kept expecting something to happen, but by the time it was night nothing had happened and she was getting bored with it. She went in to her shower to wash off before bed and took off her clothes, but she didn't notice that the necklace stayed on, seeming to pass through her shirt when she took it off. Terra got in the shower and stepped under the water, frowning as she looked down at herself. She was just starting to develop, with AA cup breasts and no real curves to speak of, but she wanted to be bigger. Most of her friends had already started to fill out, but she felt like she was falling behind. "*sigh* I wish I would just grow already" she said to herself as she closed her eyes, got some shampoo, and started to wash her hair. As she says this, the necklace got warm on her chest, but she didnt notice because of the hot water. As she was washing her hair, Terra started to get taller, her arms, legs, and torso all lengthened and she grew until she was about 5'5", then she started filling out. The first thing Terra noticed was she felt the water running over her start to flow down the middle of her chest. She opened her eyes and looked down to see her AA cups swell to A, then B size and continue growing. "What the...Oh!" Terra suddenly felt pleasure as her nipples enlarged and got hard, and her hips and ass started to fill out. She also felt her vagina grow inside her and get warm. She closed her eyes and felt the water flow over her body, down between her growing cleavage and through the crack of her ballooning ass. She'd never felt this before and was getting incredibly horny. Terra just stood under the water, running her hands over her growing body until she felt her transformation stop, then got out of the shower quickly, too excited to shut the water off or dry herself. She went over in front of her full-length mirror and saw a young woman of 18, dripping wet, with a perfect figure. She had large firm C cup breasts, hair in a vee between her legs, a slim waist and perfect ass. She slowly turned around to look at herself and thought 'Wow, is this really what I'm going to look like!' Then she noticed the crimson necklace.