Random university girls getting fatter, stage 3

The vibe I get is the girl in purple has a sweet tooth and has started gaining weight, but to make herself look smaller, she's fattening up her friend so that she's skinnier by comparison.

I wonder what kind if friendship/relationship these two have to gain together

That'd be fantastic! The girl in purple has my eye.

I'd love to see one of them become the feeder of the pair. Though, it looks like it's already started with how much larger the girl on the right is.~

As a little side plot definitely.

I want them, please do it