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 educator, 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, Miss Demonry. What is her connection to the curse where Class X is suffering from? Only one thing is probable: Jona's Class X adventure might become the deadliest challenge she can take.