Game-nai Saikyou no "Ura Boss" ni Tensei shita no de, Shujinkou no Kawarini Saisoku Clear wo Mezashimasu!

**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!