Uchi no Deshi ga Itsunomanika Jinrui Saikyou ni Natteite, Nan no Sainou mo Nai Shishou no Ore ga Sore wo Koeru Uchuu Saikyou ni Gonintei sareteiru Ken ni Tsuite  

My Disciple Has Become the Strongest Human Before I Knew It, a Master with No Talent, Was Mistakenly Recognized as the Strongest in the Universe Beyond That, A Misunderstood Mentor, うちの弟子がいつのまにか人類最強になっていて、なんの才能もない師匠の俺が、それを超える宇宙最強に誤認定されている件について, Uchi no Deshi ga Itsu no Manika Jinrui Saikyou ni Natte-ite, Nan no Sainou Monai Shishou no Ore ga, Sore wo Koeru Uchuu Saikyou ni Go Nintei Sareteiru Kudan ni Tsuite

Following my departure from my adventuring group, I spent my twilight years in seclusion within the mountains. Unbeknownst to me, my disciple rose to become the most powerful human on Earth. This led to speculation that only the strongest individual could be considered the ultimate master, overshadowing humanity as a whole. Consequently, I found myself atop the adventurer rankings. An influx of aspiring students, dragons, heroes, and demon lords flocked to me, misconstruing my true nature as that of an overpowered protagonist. However, it is important to note that this is not a tale of an overpowered main character; rather, it is a humorous portrayal of a group of misguided individuals who have mistaken me for someone far greater than I actually am.