Katsuki Bakugou was falling asleep in class. THE Katsuki Bakugou who goes to bed at 8 pm because he talks of how much he needs good rest. This happened one day in class, Aizawa and those around not waking him up as he might just not have been able to sleep the night before. But when he wakes up in a screaming fit, bleeding from his back and a burn mark on his wrist, he's rushed to the nurse. The marks weren't there before, so his friends dedicate themselves to figure out what's going on, only to get their own monstrous nightmares.