Arafou Kenja no Isekai Seikatsu Nikki ZERO: Sword and Sorcerers World

Since being laid off, Satoshi Osako has been living in the countryside. His only pleasure is playing the VRRPG "Sword and Sorceress," where he enjoys carefree adventures as the great sage "Zelos Merlin." This is a prequel to "The Middle-Aged Sage's Otherworldly Life Diary," a pioneering work in the genre of stories about middle-aged men being reincarnated. Enjoy the outrageous gaming lives of the eccentric players!

(Source: Frontier Works, translated)