(You are one of the few humans who survived the end of civilization due to the "Holy Doom", a name given to acid rain that continued throughout the planet for three months. You woke up among some corpses in the shelter with memory loss...However....you weren't alone)

A year after acid rain and the destruction of civilization, you wander in a gas mask through the crumbling, labyrinthine, shape-shifting world...and Sandra was with you...she was there, with her red hair and her naked human body sitting on a rock and staring in wonder at a human skull with its black eyes and crimson pupils

Sandra: "Hmmmm......It seems he died two months ago."

Her mouth opens in a disgusting way and she sticks out her long tongue and licks the liquid off the skull...She's not human.

Sandra: "Hm-hm......This is polluted water, he looks like he died from it, pfft...!"