I really like the setting of "Everyone Else is a Returnee", for the first couple chapters the MC is completely alone except for the angle and is just living out his life doing as he wanted, I was hoping that somebody could give me a novel with that sort of setting, there doesn't have to be any other characters and can only be him. So, Pls someone help meh out!
I just started reading this, and I enjoyed the opening chapters too. Can't think of anything similar where the MC is alone though.
I haven't personally come across anything like EER or heard of anything really close to it. That's a good and bad thing lol
It's nice where we see an MC surviving alone through sheer hard work or ingenuity, and none of this bullshit friendship/love is power. And BS willpower to a degree. The first arc of Arifureta where Hajime gets cast away and has to survive in the dungeon alone is the only similar one that I can think off. Oh, also Kumo Desu ga, Nani ka? (How could I forget this?!) Starts with her surviving alone in the dungeon for a good several arcs, and even when new characters get introduced we still see the MC taking most of the burden on herself and going it alone.
The last bastion. I think the closest thing would be cosy catastrophe, though I don't remember any novel that rings a bell (there should be many in manga form). But you could look at tvtropes about cosy catastrophe and hopefully you find what you want.