Vinlo's life was at that point just before rock bottom where you're completely sure that its ineivitable to get out and he was sure that he was going to just live the rest of his life that way

That was until a letter from the grandfather in his estranged family sent him an envelope containing a letter, a ticket, and a necklace

Regarding this as a generic "Call to Adventure" trope in the media he consumed. He took the ticket and set out for Ordinary Island. A place of new beginnings, old relations, and quite a few angry rocks.
Follow the story of Vinlo and maybe even the stories of a few other characters if I run out of ideas!

Credits to WOMBO Dream for the cover art!
I release a new chapter estimated every other day.