A Berserker Mob, I'm Going to Participate in the Main Story

Another world reincarnation. It’s also a game world.Protagonist? Rival? Villain? Important character in an event? Too bad. He’s a mob. He doesn’t even have a name in the game. He’s not even a villain’s crony or anything. He’s really just a mob.And it’s not like he has played this game very much. You might think “Why such a character?”. You might also think “he must have at least some backdoors to cheat through” or something like that.In such a world, an unaware mob of mad warriors even participates in the main game.