[Toro Toro Resistance (Ushi)] The Cave of Hypnotic Slime (Shounen ga Sakusei Seibutsu no Ejiki to Naru Goudoushi 4 Shiiku-hen) [Pluto]

A boy named Taka-kun wanders into a cave and discovers too late that the slime pinning him down is no ordinary monster — its single eyeball flashes with hypnotic light, melting his clothes and rewriting his will with every pulsing glow. What follows is a relentless milking session that wrings climax after climax from his striped-sock-clad body until he's a drooling, cross-eyed wreck whispering that his dick is broken, only for the creature's eye to flare again and drag him back under. When a braided girl finally rappels down on a rope crying out that she's here to help, she finds him soaked and twitching in a pool of slime — and her horrified scream suggests the cave's hungry new pet has just spotted its next plaything.