Uncle comes back after 17 years of being in another world.
It's funny, but I wish the entire manga (so far, at least) wasn't just the nephew/childhood friend watching the uncle's isekai adventures via his memory projector. It feels like one of those meta-commentary mangas, which are fun if that's what you're into, but I guess I was expecting something more. It's funny for what it is though
Isekai Ojisan