[kitsunekopandanuki (pandanuki)] Kisei Inchuu {sakurei}

A parasitic swarm burrows into an ordinary boy and rebuilds him from the inside out, swelling his chest and ass into enormous vein-traced curves while the worms in his brain feast on every climax. Reborn as a grinning monster girl with spiral horns, a waist too fragile to hug, and a huge new cock swinging between her thighs, she wanders the night streets until a suited commuter makes the mistake of asking why she's naked. What follows is drooling, mind-blank surrender as man, monster, and parasite tangle together in a breeding-fueled threesome — and a closing glimpse of two freckled boys hints at how ordinary the hosts once were.