Sisters Nozomi Hazuki and Azumi Ren lost their parents at a young age and were taken in by their heartless uncle. After graduating high school, they are forced to work at their uncle's mysterious establishment called "Shiiku" (Breeding), where they're fitted with electrified collars. These collars completely strip them of freedom, enforcing absolute obedience. Initially repulsed by having sex with customers, they gradually succumb to genuine pleasure, transforming into desperate, lustful bitches who beg for cock. The sisters fight over thick, powerful shafts, moaning passionately with each thrust and gushing massive amounts of fluid. Their intense desire escalates into wild threesomes, embodying deep, unrelenting ecstasy.