The Lowest-Ranked Hero Has Returned

The first time I realized that I ‘couldn’t die’ was during a practical training exercise in my third year as a hero cadet.
A beast suddenly leaped out of the bushes and tore into my neck.
‘How did I come back to life?’
Yes, I came back to life. I didn’t die.
And now, after hundreds, even thousands of years, I was still alive. Only I had survived.
“But now… it’s finally over.”
After wandering for millennia, I thought I could finally put an end to this long existence…
“Dale! Dale Han! How dare you sleep during my class? You’ve got some nerve, don’t you?”
“…Huh?”
But what awaited me at the end of my long existence wasn’t a period, but a repeat sign.