What anime is this from?
Isekai Ojisan. it’s a show about a nerd in his early twenties that gets isekai’d, then 10 years later comes back and talks to his nephew about his adventures. but he’s a really weird dude, and makes utterly bizarre choices. I hesitate to use the word autism, but he’s definitely not neurotypical. It’s a funny show, I recommend it
He isekais before the tropes of Isekai are established (1970/80s I think), so they go completely over his head. So, for example, when the tsundere elf denies liking him, he takes it at face value and leaves rather then stay in what he believes to be hostile company.
Mid to late 90ties.
Just before the trope got common. He actually watched Evangelion back then… but only because Sega was a sponsor
Isekai Ojisan / Uncle from another world
Episode 6
17:49