Sylvia, an ordinary girl living alone deep in the mountains, is visited by a man named Steve and taken to the remote city of Elanberg.

There, without understanding why, she is suddenly pushed down and roughly raped by him.

Despite the traumatic first experience, Sylvia soon feels a mysterious power surging through her body—she has unknowingly awakened a hidden talent for alchemy, triggered by semen.

Entrusted with developing the town using her new powers, Sylvia must now collect semen from men as her source of alchemical energy.

Thus, after bleeding from her lost virginity, the novice big-breasted alchemist Sylvia is born.

To fuel her alchemy and grow the remote city, she realizes with dread just how many men she'll have to take inside her...