A student purposefully casts a genderbend curse, the first of its kind. Once a person or student enters the gates of Kuromajutso Academy, he/she will turn into the opposite gender. Once the person exits the school grounds, he or she will turn back to normal. He or she will have 24 hours time to drink the antidote. If not, after 24 hours, the person will once again transform into the opposite gender and stay that way forever. Unless, however, the person has the power of nullification, then the genderbend curse shall have no effect on them.
✩the curexxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
The school still cannot find a spell that will nullify the effects of the genderbend spell, so they decided to let the spell be and developed a potion. This potion will null all effects of the genderbend when you drink it outside of the school grounds. The school only gives the permanent antidotes at the end of the school year, and temporary antidotes on long holidays and weekends when the parents of the student contact the headmistress. The teachers of the academy, however, are not affected by this genderbend curse, because they are given a bracelet of null
xxxxxxxxxxxxxxxxxxxxxx✩the evil parents
The parents, despite knowing about the genderbend curse, still enroll their children to Kuromajutso Academy. Why? Because the parents want their kids to stay in school, graduate and have stable jobs or follow in their footsteps and become the heirs of the family businesses. The students, however, are not told about the genderbend curse during their first year, they would have to find out about the curse themselves and cope with it. But they are told beforehand, that they cannot leave the school grounds once they enter the gates.