He put in 1 baht and looked at the settings. There were a lot of them, so he decided to pick one at random first. He went with 'Sex', figuring it must mean a wish that would let him get laid somehow.
After he pressed it, he felt weird. He also realized he suddenly felt weirdly aroused, and decided it would be best to rush home and try and get a look at what was happening to him. He ran for home as fast as he could, arriving in about 15 minutes.
Without even saying hello to his parents, he burst into his room and locked his door. Allowing himself to breathe, he stripped off his clothes and moaned as he saw his body. It looked subtly thinner, his skin smoother, his arms and legs more petite. Even his face seemed to have softened, any hair on it (or pretty much anywhere on his body) had vanished. Korn's nipples and penis were hard and erect, and unfamiliar sexual fantasies were racing through his head. This 'sex' wish was so weird and strong...
He panted as he felt a twinge in his chest, and saw flesh start to expand from it before his eyes as his nipples grew larger and puffier. These were breasts, Korn realized, and his brain really wanted to have them cupped and sucked and licked. Soon perky C-cups hung from his chest.
Another odd sensation was emerging lower down, and he looked down to see his penis had started to recede inside him, becoming shorter and more sensitive by the second. By this point the wish's effect was undeniable- 'sex' had meant his physical sex. She was becoming a girl.
Soon she felt his body be emasculated- his penis shrank to a tiny clitoris, his balls moved up inside him to reshape into her ovaries, and his scrotum parted to form her new vagina's lips.
A name came into her head- Korrakoj. That was who she was now, not Korn, and everyone would remember her as such. She wondered silently what to do next...