[Oyster] Butagoya - The girl is caught in a pigsty [desudesu]

A captive girl numbered 521 hangs collared and chained in her pen, her huge lactating breasts dripping while handlers force her mouth through the bars and stretch her ass with massive textured toys. Rescue arrives twisted: Minamo, a dominant doctor indebted to her savior, decides the only cure is relentless sex, gagging her onee-chan and hammering her pierced, oversized clit until her mind fractures. Hauled out drooling over a shoulder and stuffed into a truck, the broken girl whimpers that she is free and no longer a pig, right as her new owners cop one last feel.