The Reincarnated Guy Who’s Acting Like the Master

"The greatest role imaginable is being the hero's master!" Possessed by this single-minded obsession, a man was reincarnated into a fantasy world. He spent every single day honing his sword skills, all for the sake of one day mentoring a future hero (who might not even exist). Years later, he finally managed to defeat a giant squirrel monster. Yes, just barely. Despite pouring his blood, sweat, and tears into mastering the blade, this was the pathetic result. He could only defeat a single small-fry monster, one likely even weaker than the creatures found around the starting village. Utterly crushed by his apparent lack of talent, he fell into despair. And then, a new idea struck him. "I'll just become a fake master! I'll find some promising 'hero-in-the-making,' teach them the basics, and settle into the 'mentor who only appears in the prologue' role. Then, once my disciple is strong, I'll skip town before he finds out I'm actually a weakling!" His plan seemed to be proceeding perfectly. However, there was one thing he didn't know. He didn't know that the monsters in this world were abnormally strong. So strong, in fact, that besides him, there wasn't a single other swordsman alive who could defeat a monster all on their own— Thus begins a wandering tale of misunderstandings, starring an unconsciously overpowered man who continues his completely skewed efforts, all just to satisfy his own fantasy!