A year had passed since «My Hero Online» (MHO) was cleared. Izuku Midoriya (Deku) and Tenya Iida (Ingenium) were asked by government official Taneo Tokuda to investigate a game called Cybertronian Online, specifically a player who called himself «Laser Blade» and possessed a weapon that seemed to link deaths in the virtual reality (VR) world to those in the real world. Not only did Izuku find out that the criminal was associated with the Red Guild, The League of Villains, from MHO, but based upon how he killed his victims, Tenya linked it to a criminal in the real world who nearly killed his older brother while he was on patrol on the streets as a cop.
To put an end to L.O.V.'s killing spree once and for all, and to get revenge for his brother, Deku and Ingenium entered the Cybertronian Online tournament, to only make contact with the player Laser Blade, but to put to the sins they committed in My Hero Online behind them once and for all.