--In this section, the source of TFs isn't the machine, because it is completely broken. Instead, the guy and the girl found a box of experimental solutions. As you could imagine, the solutions, when someone drinks them, will change them. It can be a TGTF, a Size, a Body/Age change transformation. I will write all the chapters myself. (Or if you really want to write one create your own)--
With further inspection, it seems the machine is really in pieces. There is nothing to do about it. You check if there at least one thing interesting in this lab, and finally you find a small box. Worried about opening it alone, you call out the girl "Come here, I think I finally found something".
"Let's bring it back home" she says. "You mean, your home...?" "yes and I will make sure you are going with me." "Um, okay, it's not like I had something else to do..."
You get out of the lab. She guides you in streets you don't know, and you arrive at her flat. She opens the door, and yell "is someone there ?". No response. "Perfect, we will be undisturbed." Quickly she takes you to her room and, a little embarassed because it's the first time she invites you, she get on her bed with the box in her bag.
"Time to know what's in the box !" and she opens it. Apparently it's full of colored solutions. Some have labels with things such as "F", "S" or "BE". "I don't see what the labels mean. And you ?" "Nope. I have never seen them before. Although F must mean "Female" or something."
"There is only one way to find out. Do you follow me ?" "Isn't that a little suspicious ?".
"Well, if you are scared, I can take the lead. Let's try first the labeled ones."
Just before she grabs one, you read on the side of the box "Different substances exposed to air can lead to secondary effects in the nearby environnement, may causes : smaller version of the effects on nearby subjects, sexual arousement of subjects or amplification of effects on the subject. The box must be contained in a oxygen-poor environnement, or the box should be closed immediatly after use. If situation is no longer in control, please use the "reverse" solution, but it currently is unstable."
She takes randomly the...