Ishi no Sekai no Zecchou Kenshi

In a remote region far from the frontlines of the war between humanity and the Demon King, an entire town has been mysteriously turned to stone.

The Adventurer’s Guild dispatches an elite duo to investigate: a Saintess elder sister and her twin-blade-wielding younger sister, Rui.

Rui possesses a unique skill where her "sensitivity" increases the more damage she takes. However, during a fierce encounter, she suffers a near-fatal wound. Her hypersensitivity spirals out of control, and despite being on the brink of death, she is overwhelmed by an unimaginable, localized pleasure...!