Unlock. The heavy door of the cell opens in silence. The facility has fallen, now a maze swirling with desire and malice. A world where the boundaries of flesh are violated and rewritten in madness. The pitiful souls left within must either escape the monstrous entities lurking in the darkness or have their bodies taken by them—they must resist. CelSector: An SF side-scrolling action shooting game where you explore a vast map.

Deep within a frontier cave stands the Labyrinth's Essence Cup. It is said that by filling it with magical energy, one can obtain immense power. Inside this labyrinth, magic operates under a special law: the stronger your futanari member, the more powerful your magic; and the larger your breasts, the more spells you can unleash. Magical power dwells within sexual functions. In other words, filling the Essence Cup with magic means... continuously offering futanari fluids to the cup.