In most stories, reincarnators have the story revolve around them whether they want to or not. This always happen despite saying "Nooo~ I'll stay away from the story~~"

That is, ultimately, because they're DUMB. How do you expect to escape from the story while you generously sink your feet in the plot, dabble with all sorts of main characters and do things that make you stand out?

Obviously, I want to continue living my easy-going life.

I don't want to continuously have to worry about when I'll die. I don't want to meet with a prince - or any royalty for that matter. I don't want to get involved in some BS drama which is not drama (Your lover doesn't love you back? Ooh cry me a river, why don't you?)

And to pursue such ideals, I need to pursue the life of a mob character.

This is how you live a life of mob.