In the midst of a fierce demonic pleasure war, elite career investigator Mio faces a new crisis. Exposed to the most terrifying and obscene aphrodisiac in human history by the Female Body Torture Research Institute, she is subjected to extreme torture in front of her own sister. As Mio teeters on the edge between pleasure and madness, the surrounding investigators are ignited with rage and determination, intensifying the battle against the institute. Amidst tangled relationships and swirling emotions, the endless conflict draws closer to its end. Now, the final countdown has begun.