Isekai Ojisan
Romance
Comedy
Harem
Isekai
Fantasy
Web Comic
Slice of Life
Tragedy
Having survived an isekai for 17 years, 34 year old Ojisan (uncle) returns to modern day Japan. Takafumi, Ojisan's nephew, now gets to witness what throwing a diehard Sega fan into an isekai for 17 years does to various things and people, both past and present.