They leave you craving more

An amused chuckle snaps you from your reverie. "You know, you could always get more soda from the machine." Yutong adjusts her lab coat as she looks at you.

Right. The machine. That's how this all started. All the other girls have had their fill, now it's your turn.

No wait, that stuff would turn you into a girl! You didn't want that!

Well, didn't. Past tense. In the present, the only thing you can keep in your head other than soda is how nice it would feel to be Jane's girlfriend.

Couldn't you also make some Essence of Boyfriend or whatever, instead of strictly Girlfriend?

But that would be another flavor, and not the one you had before! What if they're incompatible? What if there's an adverse reaction? What if--

You step up to the machine to press the JUICE button once again, but Yutong stops you. "Wait! The settings are all changed! What flavor did you want?"

Right, it's set to TYP2 now, specifically SCIE. Did Yu drink this? Hasn't she always been a sciencey type? There's an empty can of Extra Mad Science next to her, exuding a distinct dentist office aroma. She's right, that's not your flavor. You need a specific one now, and that's...

"Girlfriend," you can't stop yourself from blurting out.

Yutong looks at you askance, fighting to keep the frizzy hair out of her eyes. "Girl friend? Are you sure?"

No, you're really not. You cringe inwardly. "I've tasted a few drops, and now I can't get it out of my head."

She grins toothily, and flips her goggles down over her eyes. "Got it. One can of girlfriend soda, coming right up." A blur of button presses and some loud industrial sounds later, a can in the now-familiar design of Essence of Girlfriend drops down the dispenser chute.

Before you can reach over, Yutong grabs it. "Actually, can you do me a favor? I'm really curious what this is going to do to you in detail. Could you maybe strip and let me record the changes?"

"LIN YUTONG!" You haven't seen Jane this furious before. "Do you think you can just do that to my boyfriend for your enjoyment?!"

Yutong remains completely calm. "This isn't for enjoyment. I want to know what this juice is capable of, and having more detailed data available is always good."

As long as you have known Yu, she's always been like this. She even brought an extra camera to science class just so she could still take pictures with her phone while recording a video of something else. And you definitely remember it making work easier whenever you two got paired up for an experiment.

You sigh and pull your shirt up over your head, exposing your lanky torso. You take a quick glance at Jane, who seems to have all but forgotten about her conflict with Yu at the sight of it. Encouraged by this, you take off your pants and boxers as well. The gorgeous redhead sees this as her cue to drop to her knees next to you and lay hands on your stiff member.

Just as Jane starts to stroke, Yutong interrupts you by cracking open the can of Essence of Girlfriend and blowing over the top of it to hit you with its smell. You almost trip over Jane in your haste to take the can out of her hands and start drinking, which Yu only acknowledges by pointing her phone at you.

As soon as the fruit and berry flavor hits your throat, something big stirs within you. This is the moment you've been waiting for. Time to open your eyes and gaze upon the object of your desire.