Coffin of Ashes

Delilah is an ordinary school girl. She was meant to go hiking with her classmates, but found no one at the appointed time in the appointed place. In order to take shelter from the sudden rain, she enters an old mansion. As her exploration in the mansion continues, she finds many mysterious phenomena that can't be explained. In this mansion covered by ashes, what's the secret hidden deep underground? In order to meet again, she makes a date with her friends. After going round an infinite loop 101 times, will she successfully escape the mansion with her friends?