[Help! The college entrance exam is in a hundred days, and I'm trapped in a long-abandoned, eerie school building. What do I do?]
"Welcome to the Abandoned School Building System."
"We seek out the outsiders of campus life and lure you here, keeping you in the time and place where you most want to stay so you can take part in a thrilling game you would never experience in reality."
"But... this isn't the time and place where I want to stay at all!"
He Yingli had only slipped away for a little while during the hundred-day countdown ceremony. She couldn't understand how she'd ended up inside this abandoned school building. The entire student body and faculty had vanished. She had stumbled into a distorted space, where she found those... friends? They were strangers, yet somehow familiar.
Determined not to waste twelve years of hard study, He Yingli resolved to get back within a hundred days. "A mere deduction game? Watch this genius detective clear it in one go!"
The abandoned school building has ninety-nine doors, and every one conceals an unexplored secret. On the journey to find the right exit, the mysteries she unravels are not only long-buried events, but also the heart that has gradually grown numb over her three years of high school...
"The game begins."
"Go open every door you come across!"
