Sam looked into the mirror. Staring back at him was a beautiful girl of 16 years. She had long curly hair and a figure which came closes to an hourglass. Sam guessed her breasts must bei a B-cup. She filled the bikini she was wearing very well.
Only now Sam was able to remove the bikini top. He was greated with the sight of two firm breasts with erect nipples standing about half an inch out of big aureola. He removed also the bikini bottom to find out that he was a complete she now. Her vagina was surrounde by a bush of pubic hair proving that she was a natural redhead. Sam felt intrigued to explore his new body but decided not to do so. He didn't want to be a girl. So he thought hard about his options.
"It happened when I put on my sister's bikini", he saif to himself. "So best thing is I get me a pair of trunks. That has to change me back."
After he made that decission he dressed again in the bikini and went to the shop he rembered at the entrance. There he got a pair of trunks and returned to the chnaging room. He removed the bikini and stepped into the trunks. After only a short while he could feel a weight between his legs which he remembere very well. Butb the weight on his chest didn't vanish. He had still two firm B-cuo breasts.
He removed the trunks and saw to his great relief a penis hanging down between his legs that started to erect. But to his horror he saw that besides he was male down there his upper body remained female.
"My upper body became female only when I putbthe bikini top on", he thought. "So the bikini bottom only changed the lower half. And therfore ony my lower half became male again when I put on the trunks. I need to find a male's swimsuit that also will cover the upper part of my body. This seems to be the only way to change back."