Mark, seeing the input field, jokingly typed in "Aidan was never potty trained." and clicked send. When a pop-up appeared with questions such as "subject/world aware", he chose "no" and for the transformation duration, he chose instantly, not knowing what it meant. And when it was done, Aidan entered the room again.
Aidan was already changed, but nobody noticed. Firstly he was naked, nearly. In the other reality, he had been pretty shy clothing-wise, but in the new reality, he was not. Mark had always thought of him as a weird person. Aidan had never worn normal underwear, he always wore diapers, something he had to, as he used them fully. But otherwise, Aidan was very close to a genius, a naked genius. Mark always thought that he was beautiful, Aidan had a muscular body and a great personality. He always asked himself if Aidan was also gay.
Aidan gave him his book back, Mark noticed that Aidan's diaper was already wet and a bit messy, he almost heard a hissing noise.
Mark then left. Aidan was still intrigued by the chronivac, he wanted to modify some things but did not know what exactly. One thing he did know, was that he would soon have to change his diapers as they were getting soaked. While he sometimes asked himself why he wasn't potty trained, he always liked to wear diapers. It never disturbed him.
He wasn't sure if he would modify something on himself or Mark with the chronivac.