JAV48

...Four years ago. A miraculous ore "Beulah" was dug out from a place near the North Pole. It is said to be effective against all kinds of intractable diseases. My father, Satoru Nagamine, invested a huge amount of money to obtain the right to use it. It was for my twin sister, Sayana, who was born with a strange disease and is now in a cold sleep. However...on that summer day, she and Professor Mochizuki, who was in charge of its development, disappeared without a trace... The nameless heroine, who we call ZERO, has only one reason to avenge the evil she has done. She has only one reason to defeat evil, and it is neither free self-sacrificing love nor the salvation of mankind...[BAD END]