Boring Life Accidently go to Fantasy World

An elderly man accidentally enters the fantasy world and gets youthful. He expected to find a cheating system, an elderly grandfather, or a lovely grandmother in this new world, but he get nothing.

After that, he is confined in a secret underground chamber by a dead narcissistic Grand Master mage, and he has no talent for magic, so the only way to escape is to work hard at learning magic. He finally came out after 9 years.

I post it in webnovel and novel35. (for latest chapter, in webnovel)
VOLUME 1:FINDING PATH. (CHAPTER 1-78)
VOLUME 2: DIFFICULT PATH. (CHAPTER 79-?)