Isekai Ojisan

Isekai Uncle; 異世界おじさん;; ; Uncle from Another World; My Uncle in Another World

After enduring an isekai for 17 years, 34-year-old Ojisan (uncle) makes his way back to contemporary Japan. Takafumi Ojisan, Ojisan's nephew, now has the chance to observe the effects that a devoted Sega enthusiast experiences after spending 17 years in an isekai, influencing various aspects of both the past and present.