After a Nap, I Woke up Stronger Than My Master?

"Master, are you strong?" "Haha, it's not very strong. After all, the person who can be killed as a teacher in the world hasn't even been born yet!" "Then how can I practice to surpass Master?" "Haha, if you want to be more than a master, you should go and sleep for another hundred thousand years!" "You can surpass your master by sleeping for a hundred thousand years?" "..." Master didn't expect that I actually followed his old man's joke and had a good sleep. Unexpectedly, when I woke up, my realm would surpass that of Master? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.