Alternate title they will fucking kill you

When the Davison family comes under attack during their wedding anniversary getaway, the gang of mysterious killers soon learns that one of their victims harbors a secret talent for fighting back.

In a society devastated by the effects of an all-out war between heroes and villains, a mysterious giant fortress suddenly appears, engulfing towns and people one after another. Then, a man reminiscent of All Might, the 'symbol of peace', stands in front of Izuku and his friends...