The entire narrative and exploration loop takes place on the . In this specific universe, physical violence of any kind is strictly prohibited by law. To settle disputes, clear dungeons, or pay off mounting financial debts, adventurers must engage in highly intimate, erotic combat known colloquially as "battle fucking".

The player takes on the role of a male protagonist (default name often referred to as "Ardy" in community discussions, though fully customizable) who has traveled to the continent of . Lucia is a land inhabited almost exclusively by monster girls who seek human men for companionship, reproduction, and sustenance.

The game takes place on the continent of . The setting is divided into several key hubs: