Whaaat?! The last boss.is me?! Hi, I'm Mai! When the terrifying game called Nightmare arrived, it changed my life forever. With the help of my reliable friend Asagi and our classmates, we completed the previous event in no time! The challenges aren't over though. Tsubasa gets caught up in a Battle of Wits with a new enemy. And then, the last event's last boss turns out to be.me?! When Asagi is attacked, will he be able to suss out the counterfeit?.