Arafoo Ossan wa Slow Life no Yume o Miru ka?

Even though i'm an old man, after getting rejuvenated i'm ready to start a second life in this different world!!

Makoto a 38 year old single, tired of his own life, went to a park at night and lost his life during a attack from a hoodlum. And when he opens his eyes for the first time what he saw was... a dungeon in another world! On top of this, his body has been completely rejuvenated and he has the ability to control black flames!! Using this opportunity he left the bad days he had in Japan behind, and started a new life together with Yuuka, a tsundere high school girl wearing a witch hat due to certain circumstances.

(Source: HJ Novels, Translated)