[Yukinojou] Okanehira's Book About Turning Into a Big Dicked Futanari Yakuza (Brave Sword X Blaze Soul)

Okanehira wakes up packing a monster cock and discovers the hard way that a yakuza has zero self-control, confessing to her master that ten-plus loads in one solo session have only made things worse as corrupted thoughts beg her brain to melt. One taste of a friend's tight pussy sends her into six bareback rounds without pulling out, hips moving on their own while she cums herself stupid. When the little sisters catch wind of big sis's non-stop debauchery, they barge in demanding to be used as onaholes too, and the whole thing bottoms out in a triple-blowjob pile-up where nobody—least of all the freshly minted dickgirl—wants to go back to how things used to be.