She decides to go into a store, and buy a normal white underwear, to see what it like to be a man. When she comes back, she take off her bra and panties, and puts on the underwear. She suddenly feel strange around her body. She starts to feel hair around her body, especially her face, body, and legs. Then her face starts reforming more muscular. Then her breasts starts shrinking, while she starts forming a six pack. Then her clitoris starts growing and forming into a penis. Finally, her arms, legs, hands, and feet grows more muscular. She, or rather he, now looks at his mirror to his new body, before seeing the room turning blue. His room was turning more man-like, with his girly items changing into manly items. He was liking it, before feeling the urge. She goes to the bathroom to use it, before coming out, and put on clothes to go to school.