It's Christmas at U.A. and the Class 1-A students celebrate with a Christmas party.

After failing to steal Star's Quirk, New Order, and losing many other Quirks, Shigaraki and All For One prepare for their next move. Who is the traitor at U.A.?!

Due to his relationship with All For One, Yuga Aoyama calls himself a villain, but Deku tells him that he can still be a hero and reaches a hand out to him.

As heroes and villains get ready for the coming battle, Deku and the others leave U.A., and Deku is called out by Aoyama, who is supposed to be in a police cell. What does Aoyama want?

It's finally time for the decisive battle between heroes and villains! The plan by All Might, Aizawa, and the others has them start their fights in various places around Japan!