Iroha, a member of the SWEET Angels, has set a trap for a senior member of the evil organization Kuroshishi-kai, which dominates the local area. The enraged Kuroshishi-kai is desperate to find Iroha, and kidnaps and confines her! What awaits Iroha is the endless pleasure training of men who have turned into beasts... The young flesh is forced to drink an aphrodisiac, awakens to lust, and is forcibly led to an endless hell of climaxes of pleasure. What will become of Iroha, who has fallen into pleasure?!