So to begin with, the MC is kinda an introvert, but mostly because his older sister is an awful human being who basically embodies all the negative aspects of a SJW. He's desperately counting down the days until he goes off to college to get away from her... and then he basically gets isekai'd because he happens to be near his sister and her friends (who are also assholes). The process of being isekai'd kills him and converts his remaining lifeforce into magic powers apparently.
The catch? he was unexpected, lands on a deserted island, and is literally forced to do survival wilderness to live. No cheat powers, nothing, save for the few bentos he was carrying with him. Then the gods (multiple) finally track him down, and he gets a boatload of powers. Interestingly he gets some basic standard isekai stuff, but more importantly he's not really greedy, and he gets something that literally conceptually cuts off his fate/karma/existence away from his sister.
So despite the fact that they're both isekai'd, he will hopefully never interact with her ever again. Amusingly, her ridiculously overdeveloped sense of justice (SJW Karen max) ends up causing issues, to literally no one's surprise.
Anyway, it's a weird mix of having a mild loner, pure non-magical wilderness survival for a few chapters, then to OP isekai live a life of comfort. He also has some WEIRD interactions with random people. He gets caught up in the oddest sh*t. Not bad though. I'm also not sure if there's going to be any romance (definitely no sign of a harem at this point either).
Pretty enjoyable and laidback SOL.