It's been hundreds of years since a witch professor swore and threatened the lives of all the graduating students. These days, people call it a "last-year curse" that warns students to be cautious of death before they graduate. Jona Montealto, an aspiring student leader, has a mission to fulfill in Class X. Despite knowing that such a section was branded as "the class of evils" and has multiple records of death and bullying, she still stood her ground for her one main goal: to educate them. Unbeknownst to her, there was a reason for everything in Class X. And that reason is beyond what a normal mind can believe. However, there will be the time Jona will come to meet an alleged witch professor, Ma'am Demonry. But who is Ma'am Demonry? What's her connection to the curse where Class X is suffering from? After all, one fate is probable: Jona's Class X adventure might become the deadliest challenge she can shoulder.