Unofficial alternate ending?

I finished this manga a week ago but I am utterly shattered over the ending. Are there maybe some fan-made unofficial chapters out there that finish the story differently? I know it won't be the true ending but at least it would feel good for a bit.

Maybe one where Punpun and Aiko didn't run away together, they just remained friends and Punpun is in a what-so normal relationship with Sachi. I hate the fact that Aiko is dead. I want to see her happy and smiling and I want to see Punpun heal.