I wish he’d ended up with the blond guy

Aren't we all?

as I am very NOT happy with the ending I imagine after miki got back to his childhood town, he settled there and found his own friends-and-found-family. He had to go back to his family town and reunited with the twin brother and that shitty family (also the disgusting pedo since the twin bro is such a snitch) when their grandma is dying, but miki reunited with shimazaki (the blondie) and they're git together!! And that's the happy ending we (and miki) deserve!