[Mobumomumomu] Succubus ni Maketa Shota Yuusha | Hero loses to a succubus [BranWagon]

A determined hero is overpowered by a seductive demon girl who forces him into servitude, binding his fate to her insatiable desires. He endures relentless pleasure as she claims his enlarged member, turning his heroic spirit into devoted obedience. In the end, they share a blissful union, living out their days together.