>Idk, growing a pair of tits probably.

The cup gets itself right in the middle of your chest.

You can feel the needle penetrate the skin, but there's nothing you can do.

You're arms are restrained behind your back and to the wall, so all you can do is kick, which doesn't help you much here.

The needle stays in you for much longer than the ass one did. Rather than the tiny dosage that made your cheeks inflate, its a stream of liquid comes down from the ceiling and into you.

The cuffs let you free and you instantly put your hands to your chest.

Any second now... you're gonna feel that same pressure from your ass.

You hold onto your chest tight, bracing, and bracing for... oh... nothing?

You actually don't really feel anything.

...

...

"aaAHHHH~"

Fuck. Okay. Nevermind.

You roll onto the bed from the intense pressure, clutching onto the frame for support.

Your skin is definitely stretching as all the fat melts straight into each part of your chest.

You look down and see your nipples rising.

The skin below them starts to subtly fluff up. They started off looking like mosquito bites, but after a bit it was looking like two tiny muffin tops rising in an oven as they cook.

The tiny peeks extend outwards and start to look like thin, fluffy pancakes. This must be what A-cups look like.

The two mounds continue to fluff up. You give one a poke with your finger and- fuck that's sensitive. It sends a shiver through your whole body.

You go back to clutching the bed. The hills grow out more and more, filling evenly.

They're still small but they've doubled in size since you tried to touch them.

You decide to sit up and... wow. The boobs sag ever-so-slightly downward.

Just that, the sensation of your chest being affected by gravity is so strange. Just them grazing the air and rubbing against more of your skin as you move sends a similar feel through your body.

As you shift from side to side, the twin peaks shift around too, following your movement.

They continue to fill, and as they fill they droop more and more.

Now the expansion looks more like two water balloons being filled.

The balloons are definitely noticeable now. They have a very subtle swing to them as you move.

This feels different from when your ass grew out. You had an ass before, you've never had boobs.

You decide to stand up. The quick movement creates a subtle bounce.

"What are these? C-Cups?" You ask the scientist. You don't really know cup-sizes that well.

As you ask him, you can he doesn't really know either, they're probably a little less than C.