Hosu Incident

The Hosu Incident is an event that takes place during the Unforeseen Simulation Joint Arc.

Prologue
After killing seventeen heroes and injuring twenty-three beyond recovery, Hero Killer: Stain becomes a scurge on the hero community. The Turbo Hero: Ingenium and his squad search for Stain in Hosu. Ingenium eventually finds Stain in an alleyway and confronts the villain. The Hero Killer manages to greviously injure Ingenium and leaves him for dead.

The news of the attack draws the League of Villains to Stain. They approach him on the roof of a building and invite him into their hideout. Tomura Shigaraki asks Stain to join their party. Stain asks for Tomura's motivations and is deeply disappointed with the answer.

The villains come to blows, Stain paralyzes Kurogiri, then stabs Tomura and pins him to the ground. Stain tells Tomura that he's weak because he lacks conviction. Tomura destroys Stain's knife and forces him back. He tells the Hero Killer that he desires to destroy society because it praises All Might. Stain realizes that they both agree to destroy the present. Tomura demands he leave and Stain explains he attacked him to test his motives. Kurogiri is freed and he agrees to return Stain to Hosu.