Indigestion can be indeed a nasty beast, even more if you have a very, VERY, slow reptilian metabolism, like the poor Shuichi Iguchi. Long before becoming Spinner, the member of the infamous League of Villains led by Shigaraki Tomura, Shuichi was... well, just Shuichi: a lone soul, always locked into his home, like the most classic of hikikomoris.
Always hidden in his small, dark and cozy temple, the young weilder of mutant quirk constantly repressed his villanous side, but this time, when a delivery boy came, instinct took over the future villain's mind: Shuichi gobbled up the delivery boy, whole and alive, trapping him inside himself along all the pizzas he brought.
And now there he is, with a wide and taut gut, slowly and noisily digesting everything it has been gifted with... be it alive or not.
A first step, for Shuichi, to become the most loyal comrade of Shigaraki Tomura.

Internal Version: https://www.furaffinity.net/view/59114293/

Awesome piece by  GabbageBin