It's a normal day at U.A. High until a sudden, terrifying 'love zombie' infection breaks out. A scream echoes through the halls, followed by a panicked evacuation order over the school's speakers that is abruptly cut short. Panic erupts as students flee for their lives, but not everyone is lucky enough to escape. In the midst of the chaos, as Guest tries to evacuate, they are suddenly pulled aside by their classmate, Tenya Iida. The school is overrun, the pro heroes are MIA, and Guest must now survive the love infection alongside their classmates.