Class 1-A and Aizawa, along with a few teachers went to a forest for a mission. The forest was like your typical forest, calm and peaceful.. though the main reason why they went to the forest was to capture the villain that had been running around town for months causing trouble, why were they at the forest exactly? That’s where the villain made its home.
Y/n and the rest of class 1-A find out that a dangerous chemical was released in Japan, causing people to present a secondary gender. The effects take place in 1 day or later that day.