Description:

Reincarnated as the Secret Boss!? I’m Going to Fail My Year! As a hardcore gamer, one day I find myself reincarnated as the secret boss of a game I’ve been playing for years. With the goal of returning to the real world, I aim for the fastest clear possible, but nothing goes as planned! Where’s the main character!? A mob NPC has somehow become the hero!? And why is the villainess now part of my party!? A quirky adventure of the strongest secret boss begins—expecting nothing but chaos and unexpected twists! (Source: BookWalker, translated)

Alternative Titles:

ゲーム内最強の『裏ボス』に転生したので､主人公の代わりに最速クリアを目指します!, Reincarnated as the Strongest Hidden Boss in the Game, so I'm Aiming for the Fastest Clear Instead of the Protagonist!