"Tighten It!" (Pixiv Fanbox)

Each thunderous blow to her belly sends pain surging through her guts, commanding her muscles to tighten, to try to protect the tender and vital cargo of her abdominal cavity. In turn, every merciless punch raises an instinctive tightening in her orifices, a tightness that increases the pleasure of the man behind her. He drives his manhood deep into her ass, forcing her tight passage open, inflicting an agony that demonstrates categorically that her body is his to master, that in her bondage she must take whatever hurt he chooses to deliver in pursuit of his release in her degraded, battered guts. Despite her humiliation, she longs for that release. Satisfying his cruel appetite is the only hope that her torment shall come to an end. Until he spends himself in her taut, clinging asshole, she can only obey the implicit order that roars with every impact of a fist within her belly, every thrust tearing through her back door: "Tighten it!" --- This loop is offered freely on my Fanbox channel. It is NOT in substitution for the third and final part of the "belly dancer" sequence, which should be released later this month. Hope that you enjoy it!