Development App (Commission) (Patreon)

Commissioned by Shironomi from Discord, and paid for by Heromanbunny (who is much too generous to be a real person I think).

A young centaur futa didn't get much from puberty. By centaur standards, she'd pretty small and not much to look at. That is, until her friend gets a mysterious app. You can probably guess where things go from there.