When a mysterious package arrives from his friend, Sakura, the protagonist opens it—only to be instantly teleported into an alternate dimension ruled by a succubus.
They aren’t alone. A crowd of men and women are trapped alongside them, and the succubus issues a twisted ultimatum: conquer her dungeon, or stay trapped forever. To make matters worse, she has branded every female captive with a cursed Crest of Lust.
Time is running out. If they don’t escape quickly, the curse will take over, driving the women into an insatiable frenzy for sex until they permanently transform into succubi. The protagonist must fight through the dungeon to clear the curse and save Sakura from this fate.
