Wu Xi was about to start her first year of high school, but after doing poorly on the high school entrance exam, she failed to get into the school she wanted and ended up at a private high school. But this private school was unlike the others. She and the five girls in her dorm formed an adventure squad to investigate the "Mysterious Disappearance of Class Seven, Senior Year," which had happened at the school three years earlier.
The matter of Class Seven, Senior Year was never resolved, and they were soon swept into a series of other adventures...
"This is a death loop. We're trapped here."
"Can we really get out?"
Knock, knock, knock, knock. The bell rang, and they were about to embark on another adventure...
