The Hidden Dungeon is a mythical location that conceals valuable treasures and goods. Noir belongs to a destitute aristocratic household and has lost the only job possibility he had. By sheer luck, he learns about the dungeon and gets his hands on a unique ability that enables him to form, grant, and modify skills. The only way he can activate this skill is by amassing points through pleasurable activities, such as relishing delectable dishes and engaging in intimate encounters with enticing members of the opposite gender.